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-@c -*-texinfo-*-
-@c This is part of the GNU Emacs Lisp Reference Manual.
-@c Copyright (C) 1990, 1991, 1992, 1993, 1995, 1998 Free Software Foundation, Inc.
-@c See the file elisp.texi for copying conditions.
-@node Calendar, System Interface, Display, Top
-@chapter Customizing the Calendar and Diary
-
-  There are many customizations that you can use to make the calendar and
-diary suit your personal tastes.
-
-@menu
-* Calendar Customizing::   Defaults you can set.
-* Holiday Customizing::    Defining your own holidays.
-* Date Display Format::    Changing the format.
-* Time Display Format::    Changing the format.
-* Daylight Savings::       Changing the default.
-* Diary Customizing::      Defaults you can set.
-* Hebrew/Islamic Entries:: How to obtain them.
-* Fancy Diary Display::    Enhancing the diary display, sorting entries,
-                             using included diary files.
-* Sexp Diary Entries::     Fancy things you can do.
-* Appt Customizing::       Customizing appointment reminders.
-@end menu
-
-@node Calendar Customizing
-@section Customizing the Calendar
-@vindex view-diary-entries-initially
-
-  If you set the variable @code{view-diary-entries-initially} to
-@code{t}, calling up the calendar automatically displays the diary
-entries for the current date as well.  The diary dates appear only if
-the current date is visible.  If you add both of the following lines to
-your init file:@refill
-
-@example
-(setq view-diary-entries-initially t)
-(calendar)
-@end example
-
-@noindent
-this displays both the calendar and diary windows whenever you start Emacs.
-
-@vindex view-calendar-holidays-initially
-  Similarly, if you set the variable
-@code{view-calendar-holidays-initially} to @code{t}, entering the
-calendar automatically displays a list of holidays for the current
-three-month period.  The holiday list appears in a separate
-window.
-
-@vindex mark-diary-entries-in-calendar
-  You can set the variable @code{mark-diary-entries-in-calendar} to
-@code{t} in order to mark any dates with diary entries.  This takes
-effect whenever the calendar window contents are recomputed.  There are
-two ways of marking these dates: by changing the face (@pxref{Faces}),
-or by placing a plus sign (@samp{+}) beside the date.
-
-@vindex mark-holidays-in-calendar
-  Similarly, setting the variable @code{mark-holidays-in-calendar} to
-@code{t} marks holiday dates, either with a change of face or with an
-asterisk (@samp{*}).
-
-@vindex calendar-holiday-marker
-@vindex diary-entry-marker
-  The variable @code{calendar-holiday-marker} specifies how to mark a
-date as being a holiday.  Its value may be a single-character string
-to insert next to the date, or a face name to use for displaying the
-date.  Likewise, the variable @code{diary-entry-marker} specifies how
-to mark a date that has diary entries.  The calendar creates faces
-named @code{holiday-face} and @code{diary-face} for these purposes;
-those symbols are the default values of these variables.
-
-@vindex calendar-load-hook
-  The variable @code{calendar-load-hook} is a normal hook run when the
-calendar package is first loaded (before actually starting to display
-the calendar).
-
-@vindex initial-calendar-window-hook
-  Starting the calendar runs the normal hook
-@code{initial-calendar-window-hook}.  Recomputation of the calendar
-display does not run this hook.  But if you leave the calendar with the
-@kbd{q} command and reenter it, the hook runs again.@refill
-
-@vindex today-visible-calendar-hook
-  The variable @code{today-visible-calendar-hook} is a normal hook run
-after the calendar buffer has been prepared with the calendar when the
-current date is visible in the window.  One use of this hook is to
-replace today's date with asterisks; to do that, use the hook function
-@code{calendar-star-date}.
-
-@findex calendar-star-date
-@example
-(add-hook 'today-visible-calendar-hook 'calendar-star-date)
-@end example
-
-@noindent
-Another standard hook function marks the current date, either by
-changing its face or by adding an asterisk.  Here's how to use it:
-
-@findex calendar-mark-today
-@example
-(add-hook 'today-visible-calendar-hook 'calendar-mark-today)
-@end example
-
-@noindent
-@vindex calendar-today-marker
-The variable @code{calendar-today-marker} specifies how to mark
-today's date.  Its value should be a single-character string to insert
-next to the date or a face name to use for displaying the date.  A
-face named @code{calendar-today-face} is provided for this purpose;
-that symbol is the default for this variable.
-
-@vindex today-invisible-calendar-hook
-@noindent
-  A similar normal hook, @code{today-invisible-calendar-hook} is run if
-the current date is @emph{not} visible in the window.
-
-@vindex calendar-move-hook
-  Each of the calendar cursor motion commands runs the hook
-@code{calendar-move-hook} after it moves the cursor.
-
-@node Holiday Customizing
-@section Customizing the Holidays
-
-@vindex calendar-holidays
-@vindex christian-holidays
-@vindex hebrew-holidays
-@vindex islamic-holidays
-  Emacs knows about holidays defined by entries on one of several lists.
-You can customize these lists of holidays to your own needs, adding or
-deleting holidays.  The lists of holidays that Emacs uses are for
-general holidays (@code{general-holidays}), local holidays
-(@code{local-holidays}), Christian holidays (@code{christian-holidays}),
-Hebrew (Jewish) holidays (@code{hebrew-holidays}), Islamic (Muslim)
-holidays (@code{islamic-holidays}), and other holidays
-(@code{other-holidays}).
-
-@vindex general-holidays
-  The general holidays are, by default, holidays common throughout the
-United States.  To eliminate these holidays, set @code{general-holidays}
-to @code{nil}.
-
-@vindex local-holidays
-  There are no default local holidays (but sites may supply some).  You
-can set the variable @code{local-holidays} to any list of holidays, as
-described below.
-
-@vindex all-christian-calendar-holidays
-@vindex all-hebrew-calendar-holidays
-@vindex all-islamic-calendar-holidays
-  By default, Emacs does not include all the holidays of the religions
-that it knows, only those commonly found in secular calendars.  For a
-more extensive collection of religious holidays, you can set any (or
-all) of the variables @code{all-christian-calendar-holidays},
-@code{all-hebrew-calendar-holidays}, or
-@code{all-islamic-calendar-holidays} to @code{t}.  If you want to
-eliminate the religious holidays, set any or all of the corresponding
-variables @code{christian-holidays}, @code{hebrew-holidays}, and
-@code{islamic-holidays} to @code{nil}.@refill
-
-@vindex other-holidays
-  You can set the variable @code{other-holidays} to any list of
-holidays.  This list, normally empty, is intended for individual use.
-
-@cindex holiday forms
-  Each of the lists (@code{general-holidays}, @code{local-holidays},
-@code{christian-holidays}, @code{hebrew-holidays},
-@code{islamic-holidays}, and @code{other-holidays}) is a list of
-@dfn{holiday forms}, each holiday form describing a holiday (or
-sometimes a list of holidays).
-
-  Here is a table of the possible kinds of holiday form.  Day numbers
-and month numbers count starting from 1, but ``dayname'' numbers
-count Sunday as 0.  The element @var{string} is always the
-name of the holiday, as a string.
-
-@table @code
-@item (holiday-fixed @var{month} @var{day} @var{string})
-A fixed date on the Gregorian calendar.
-
-@item (holiday-float @var{month} @var{dayname} @var{k} @var{string})
-The @var{k}th @var{dayname} in @var{month} on the Gregorian calendar
-(@var{dayname}=0 for Sunday, and so on); negative @var{k} means count back
-from the end of the month.
-
-@item (holiday-hebrew @var{month} @var{day} @var{string})
-A fixed date on the Hebrew calendar.
-
-@item (holiday-islamic @var{month} @var{day} @var{string})
-A fixed date on the Islamic calendar.
-
-@item (holiday-julian @var{month} @var{day} @var{string})
-A fixed date on the Julian calendar.
-
-@item (holiday-sexp @var{sexp} @var{string})
-A date calculated by the Lisp expression @var{sexp}.  The expression
-should use the variable @code{year} to compute and return the date of a
-holiday, or @code{nil} if the holiday doesn't happen this year.  The
-value of @var{sexp} must represent the date as a list of the form
-@code{(@var{month} @var{day} @var{year})}.
-
-@item (if @var{condition} @var{holiday-form})
-A holiday that happens only if @var{condition} is true.
-
-@item (@var{function} @r{[}@var{args}@r{]})
-A list of dates calculated by the function @var{function}, called with
-arguments @var{args}.
-@end table
-
-  For example, suppose you want to add Bastille Day, celebrated in
-France on July 14.  You can do this as follows:
-
-@smallexample
-(setq other-holidays '((holiday-fixed 7 14 "Bastille Day")))
-@end smallexample
-
-@noindent
-The holiday form @code{(holiday-fixed 7 14 "Bastille Day")} specifies the
-fourteenth day of the seventh month (July).
-
-  Many holidays occur on a specific day of the week, at a specific time
-of month.  Here is a holiday form describing Hurricane Supplication Day,
-celebrated in the Virgin Islands on the fourth Monday in August:
-
-@smallexample
-(holiday-float 8 1 4 "Hurricane Supplication Day")
-@end smallexample
-
-@noindent
-Here the 8 specifies August, the 1 specifies Monday (Sunday is 0,
-Tuesday is 2, and so on), and the 4 specifies the fourth occurrence in
-the month (1 specifies the first occurrence, 2 the second occurrence,
-@minus{}1 the last occurrence, @minus{}2 the second-to-last occurrence, and
-so on).
-
-  You can specify holidays that occur on fixed days of the Hebrew,
-Islamic, and Julian calendars too.  For example,
-
-@smallexample
-(setq other-holidays
-      '((holiday-hebrew 10 2 "Last day of Hanukkah")
-        (holiday-islamic 3 12 "Mohammed's Birthday")
-        (holiday-julian 4 2 "Jefferson's Birthday")))
-@end smallexample
-
-@noindent
-adds the last day of Hanukkah (since the Hebrew months are numbered with
-1 starting from Nisan), the Islamic feast celebrating Mohammed's
-birthday (since the Islamic months are numbered from 1 starting with
-Muharram), and Thomas Jefferson's birthday, which is 2 April 1743 on the
-Julian calendar.
-
-  To include a holiday conditionally, use either Emacs Lisp's @code{if} or the
-@code{holiday-sexp} form.  For example, American presidential elections
-occur on the first Tuesday after the first Monday in November of years
-divisible by 4:
-
-@smallexample
-(holiday-sexp '(if (= 0 (% year 4))
-                   (calendar-gregorian-from-absolute
-                    (1+ (calendar-dayname-on-or-before
-                          1 (+ 6 (calendar-absolute-from-gregorian
-                                  (list 11 1 year)))))))
-              "US Presidential Election")
-@end smallexample
-
-@noindent
-or
-
-@smallexample
-(if (= 0 (% displayed-year 4))
-    (fixed 11
-           (extract-calendar-day
-             (calendar-gregorian-from-absolute
-               (1+ (calendar-dayname-on-or-before
-                     1 (+ 6 (calendar-absolute-from-gregorian
-                              (list 11 1 displayed-year)))))))
-           "US Presidential Election"))
-@end smallexample
-
-  Some holidays just don't fit into any of these forms because special
-calculations are involved in their determination.  In such cases you
-must write a Lisp function to do the calculation.  To include eclipses,
-for example, add @code{(eclipses)} to @code{other-holidays}
-and write an Emacs Lisp function @code{eclipses} that returns a
-(possibly empty) list of the relevant Gregorian dates among the range
-visible in the calendar window, with descriptive strings, like this:
-
-@smallexample
-(((6 27 1991) "Lunar Eclipse") ((7 11 1991) "Solar Eclipse") ... )
-@end smallexample
-
-@node Date Display Format
-@section Date Display Format
-@vindex calendar-date-display-form
-
-  You can customize the manner of displaying dates in the diary, in mode
-lines, and in messages by setting @code{calendar-date-display-form}.
-This variable holds a list of expressions that can involve the variables
-@code{month}, @code{day}, and @code{year}, which are all numbers in
-string form, and @code{monthname} and @code{dayname}, which are both
-alphabetic strings.  In the American style, the default value of this
-list is as follows:
-
-@smallexample
-((if dayname (concat dayname ", ")) monthname " " day ", " year)
-@end smallexample
-
-@noindent
-while in the European style this value is the default:
-
-@smallexample
-((if dayname (concat dayname ", ")) day " " monthname " " year)
-@end smallexample
-
-@noindent
-The ISO standard date representation is this:
-
-@smallexample
-(year "-" month "-" day)
-@end smallexample
-
-@noindent
-This specifies a typical American format:
-
-@smallexample
-(month "/" day "/" (substring year -2))
-@end smallexample
-
-@node Time Display Format
-@section Time Display Format
-@vindex calendar-time-display-form
-
-  The calendar and diary by default display times of day in the
-conventional American style with the hours from 1 through 12, minutes,
-and either @samp{am} or @samp{pm}.  If you prefer the European style,
-also known in the US as military, in which the hours go from 00 to 23,
-you can alter the variable @code{calendar-time-display-form}.  This
-variable is a list of expressions that can involve the variables
-@code{12-hours}, @code{24-hours}, and @code{minutes}, which are all
-numbers in string form, and @code{am-pm} and @code{time-zone}, which are
-both alphabetic strings.  The default value of
-@code{calendar-time-display-form} is as follows:
-
-@smallexample
-(12-hours ":" minutes am-pm
-          (if time-zone " (") time-zone (if time-zone ")"))
-@end smallexample
-
-@noindent
-Here is a value that provides European style times:
-
-@smallexample
-(24-hours ":" minutes
-          (if time-zone " (") time-zone (if time-zone ")"))
-@end smallexample
-
-@node Daylight Savings
-@section Daylight Savings Time
-@cindex daylight savings time
-
-  Emacs understands the difference between standard time and daylight
-savings time---the times given for sunrise, sunset, solstices,
-equinoxes, and the phases of the moon take that into account.  The rules
-for daylight savings time vary from place to place and have also varied
-historically from year to year.  To do the job properly, Emacs needs to
-know which rules to use.
-
-  Some operating systems keep track of the rules that apply to the place
-where you are; on these systems, Emacs gets the information it needs
-from the system automatically.  If some or all of this information is
-missing, Emacs fills in the gaps with the rules currently used in
-Cambridge, Massachusetts, which is the center of GNU's world.
-
-
-@vindex calendar-daylight-savings-starts
-@vindex calendar-daylight-savings-ends
-  If the default choice of rules is not appropriate for your location,
-you can tell Emacs the rules to use by setting the variables
-@code{calendar-daylight-savings-starts} and
-@code{calendar-daylight-savings-ends}.  Their values should be Lisp
-expressions that refer to the variable @code{year}, and evaluate to the
-Gregorian date on which daylight savings time starts or (respectively)
-ends, in the form of a list @code{(@var{month} @var{day} @var{year})}.
-The values should be @code{nil} if your area does not use daylight
-savings time.
-
-  Emacs uses these expressions to determine the start and end dates of
-daylight savings time as holidays and for correcting times of day in the
-solar and lunar calculations.
-
-  The values for Cambridge, Massachusetts are as follows:
-
-@example
-@group
-(calendar-nth-named-day 1 0 4 year)
-(calendar-nth-named-day -1 0 10 year)
-@end group
-@end example
-
-@noindent
-i.e., the first 0th day (Sunday) of the fourth month (April) in
-the year specified by @code{year}, and the last Sunday of the tenth month
-(October) of that year.  If daylight savings time were
-changed to start on October 1, you would set
-@code{calendar-daylight-savings-starts} to this:
-
-@example
-(list 10 1 year)
-@end example
-
-  For a more complex example, suppose daylight savings time begins on
-the first of Nisan on the Hebrew calendar.  You should set
-@code{calendar-daylight-savings-starts} to this value:
-
-@example
-(calendar-gregorian-from-absolute
-  (calendar-absolute-from-hebrew
-    (list 1 1 (+ year 3760))))
-@end example
-
-@noindent
-because Nisan is the first month in the Hebrew calendar and the Hebrew
-year differs from the Gregorian year by 3760 at Nisan.
-
-  If there is no daylight savings time at your location, or if you want
-all times in standard time, set @code{calendar-daylight-savings-starts}
-and @code{calendar-daylight-savings-ends} to @code{nil}.
-
-@vindex calendar-daylight-time-offset
-  The variable @code{calendar-daylight-time-offset} specifies the
-difference between daylight savings time and standard time, measured in
-minutes.  The value for Cambridge is 60.
-
-@vindex calendar-daylight-savings-starts-time
-@vindex calendar-daylight-savings-ends-time
-  The variable @code{calendar-daylight-savings-starts-time} and the
-variable @code{calendar-daylight-savings-ends-time} specify the number
-of minutes after midnight local time when the transition to and from
-daylight savings time should occur.  For Cambridge, both variables'
-values are 120.
-
-@node Diary Customizing
-@section Customizing the Diary
-
-@vindex holidays-in-diary-buffer
-  Ordinarily, the mode line of the diary buffer window indicates any
-holidays that fall on the date of the diary entries.  The process of
-checking for holidays can take several seconds, so including holiday
-information delays the display of the diary buffer noticeably.  If you'd
-prefer to have a faster display of the diary buffer but without the
-holiday information, set the variable @code{holidays-in-diary-buffer} to
-@code{nil}.@refill
-
-@vindex number-of-diary-entries
-  The variable @code{number-of-diary-entries} controls the number of
-days of diary entries to be displayed at one time.  It affects the
-initial display when @code{view-diary-entries-initially} is @code{t}, as
-well as the command @kbd{M-x diary}.  For example, the default value is
-1, which says to display only the current day's diary entries.  If the
-value is 2, both the current day's and the next day's entries are
-displayed.  The value can also be a vector of seven elements: for
-example, if the value is @code{[0 2 2 2 2 4 1]} then no diary entries
-appear on Sunday, the current date's and the next day's diary entries
-appear Monday through Thursday, Friday through Monday's entries appear
-on Friday, while on Saturday only that day's entries appear.
-
-@vindex print-diary-entries-hook
-@findex print-diary-entries
-  The variable @code{print-diary-entries-hook} is a normal hook run
-after preparation of a temporary buffer containing just the diary
-entries currently visible in the diary buffer.  (The other, irrelevant
-diary entries are really absent from the temporary buffer; in the diary
-buffer, they are merely hidden.)  The default value of this hook does
-the printing with the command @code{lpr-buffer}.  If you want to use a
-different command to do the printing, just change the value of this
-hook.  Other uses might include, for example, rearranging the lines into
-order by day and time.
-
-@vindex diary-date-forms
-  You can customize the form of dates in your diary file, if neither the
-standard American nor European styles suits your needs, by setting the
-variable @code{diary-date-forms}.  This variable is a list of patterns
-for recognizing a date.  Each date pattern is a list whose elements may
-be regular expressions (@pxref{Regular Expressions}) or the symbols
-@code{month}, @code{day}, @code{year}, @code{monthname}, and
-@code{dayname}.  All these elements serve as patterns that match certain
-kinds of text in the diary file.  In order for the date pattern, as a
-whole, to match, all of its elements must match consecutively.
-
-  A regular expression in a date pattern matches in its usual fashion,
-using the standard syntax table altered so that @samp{*} is a word
-constituent.
-
-  The symbols @code{month}, @code{day}, @code{year}, @code{monthname},
-and @code{dayname} match the month number, day number, year number,
-month name, and day name of the date being considered.  The symbols that
-match numbers allow leading zeros; those that match names allow
-three-letter abbreviations and capitalization.  All the symbols can
-match @samp{*}; since @samp{*} in a diary entry means ``any day'', ``any
-month'', and so on, it should match regardless of the date being
-considered.
-
-  The default value of @code{diary-date-forms} in the American style is
-this:
-
-@example
-((month "/" day "[^/0-9]")
- (month "/" day "/" year "[^0-9]")
- (monthname " *" day "[^,0-9]")
- (monthname " *" day ", *" year "[^0-9]")
- (dayname "\\W"))
-@end example
-
-  The date patterns in the list must be @emph{mutually exclusive} and
-must not match any portion of the diary entry itself, just the date and
-one character of whitespace.  If, to be mutually exclusive, the pattern
-must match a portion of the diary entry text---beyond the whitespace
-that ends the date---then the first element of the date pattern
-@emph{must} be @code{backup}.  This causes the date recognizer to back
-up to the beginning of the current word of the diary entry, after
-finishing the match.  Even if you use @code{backup}, the date pattern
-must absolutely not match more than a portion of the first word of the
-diary entry.  The default value of @code{diary-date-forms} in the
-European style is this list:
-
-@example
-((day "/" month "[^/0-9]")
- (day "/" month "/" year "[^0-9]")
- (backup day " *" monthname "\\W+\\<[^*0-9]")
- (day " *" monthname " *" year "[^0-9]")
- (dayname "\\W"))
-@end example
-
-@noindent
-Notice the use of @code{backup} in the third pattern, because it needs
-to match part of a word beyond the date itself to distinguish it from
-the fourth pattern.
-
-@node Hebrew/Islamic Entries
-@section Hebrew- and Islamic-Date Diary Entries
-
-  Your diary file can have entries based on Hebrew or Islamic dates, as
-well as entries based on the world-standard Gregorian calendar.
-However, because recognition of such entries is time-consuming and most
-people don't use them, you must explicitly enable their use.  If you
-want the diary to recognize Hebrew-date diary entries, for example,
-you must do this:
-
-@vindex nongregorian-diary-listing-hook
-@vindex nongregorian-diary-marking-hook
-@findex list-hebrew-diary-entries
-@findex mark-hebrew-diary-entries
-@smallexample
-(add-hook 'nongregorian-diary-listing-hook 'list-hebrew-diary-entries)
-(add-hook 'nongregorian-diary-marking-hook 'mark-hebrew-diary-entries)
-@end smallexample
-
-@noindent
-If you want Islamic-date entries, do this:
-
-@findex list-islamic-diary-entries
-@findex mark-islamic-diary-entries
-@smallexample
-(add-hook 'nongregorian-diary-listing-hook 'list-islamic-diary-entries)
-(add-hook 'nongregorian-diary-marking-hook 'mark-islamic-diary-entries)
-@end smallexample
-
-  Hebrew- and Islamic-date diary entries have the same formats as
-Gregorian-date diary entries, except that @samp{H} precedes a Hebrew
-date and @samp{I} precedes an Islamic date.  Moreover, because the
-Hebrew and Islamic month names are not uniquely specified by the first
-three letters, you may not abbreviate them.  For example, a diary entry
-for the Hebrew date Heshvan 25 could look like this:
-
-@smallexample
-HHeshvan 25 Happy Hebrew birthday!
-@end smallexample
-
-@noindent
-and would appear in the diary for any date that corresponds to Heshvan 25
-on the Hebrew calendar.  And here is an Islamic-date diary entry that matches
-Dhu al-Qada 25:
-
-@smallexample
-IDhu al-Qada 25 Happy Islamic birthday!
-@end smallexample
-
-  As with Gregorian-date diary entries, Hebrew- and Islamic-date entries
-are nonmarking if they are preceded with an ampersand (@samp{&}).
-
-  Here is a table of commands used in the calendar to create diary entries
-that match the selected date and other dates that are similar in the Hebrew
-or Islamic calendar:
-
-@table @kbd
-@item i h d
-Add a diary entry for the Hebrew date corresponding to the selected date
-(@code{insert-hebrew-diary-entry}).
-@item i h m
-Add a diary entry for the day of the Hebrew month corresponding to the
-selected date (@code{insert-monthly-hebrew-diary-entry}).  This diary
-entry matches any date that has the same Hebrew day-within-month as the
-selected date.
-@item i h y
-Add a diary entry for the day of the Hebrew year corresponding to the
-selected date (@code{insert-yearly-hebrew-diary-entry}).  This diary
-entry matches any date which has the same Hebrew month and day-within-month
-as the selected date.
-@item i i d
-Add a diary entry for the Islamic date corresponding to the selected date
-(@code{insert-islamic-diary-entry}).
-@item i i m
-Add a diary entry for the day of the Islamic month corresponding to the
-selected date (@code{insert-monthly-islamic-diary-entry}).
-@item i i y
-Add a diary entry for the day of the Islamic year corresponding to the
-selected date (@code{insert-yearly-islamic-diary-entry}).
-@end table
-
-@findex insert-hebrew-diary-entry
-@findex insert-monthly-hebrew-diary-entry
-@findex insert-yearly-hebrew-diary-entry
-@findex insert-islamic-diary-entry
-@findex insert-monthly-islamic-diary-entry
-@findex insert-yearly-islamic-diary-entry
-  These commands work much like the corresponding commands for ordinary
-diary entries: they apply to the date that point is on in the calendar
-window, and what they do is insert just the date portion of a diary entry
-at the end of your diary file.  You must then insert the rest of the
-diary entry.
-
-@node Fancy Diary Display
-@section Fancy Diary Display
-@vindex diary-display-hook
-@findex simple-diary-display
-
-  Diary display works by preparing the diary buffer and then running the
-hook @code{diary-display-hook}.  The default value of this hook
-(@code{simple-diary-display}) hides the irrelevant diary entries and
-then displays the buffer.  However, if you specify the hook as follows,
-
-@cindex diary buffer
-@findex fancy-diary-display
-@example
-(add-hook 'diary-display-hook 'fancy-diary-display)
-@end example
-
-@noindent
-this enables fancy diary display.  It displays diary entries and
-holidays by copying them into a special buffer that exists only for the
-sake of display.  Copying to a separate buffer provides an opportunity
-to change the displayed text to make it prettier---for example, to sort
-the entries by the dates they apply to.
-
-  As with simple diary display, you can print a hard copy of the buffer
-with @code{print-diary-entries}.  To print a hard copy of a day-by-day
-diary for a week, position point on Sunday of that week, type
-@kbd{7 d}, and then do @kbd{M-x print-diary-entries}.  As usual, the
-inclusion of the holidays slows down the display slightly; you can speed
-things up by setting the variable @code{holidays-in-diary-buffer} to
-@code{nil}.
-
-@vindex diary-list-include-blanks
-  Ordinarily, the fancy diary buffer does not show days for which there are
-no diary entries, even if that day is a holiday.  If you want such days to be
-shown in the fancy diary buffer, set the variable
-@code{diary-list-include-blanks} to @code{t}.@refill
-
-@cindex sorting diary entries
-  If you use the fancy diary display, you can use the normal hook
-@code{list-diary-entries-hook} to sort each day's diary entries by their
-time of day.  Here's how:
-
-@findex sort-diary-entries
-@example
-(add-hook 'list-diary-entries-hook 'sort-diary-entries t)
-@end example
-
-@noindent
-For each day, this sorts diary entries that begin with a recognizable
-time of day according to their times.  Diary entries without times come
-first within each day.
-
-  Fancy diary display also has the ability to process included diary
-files.  This permits a group of people to share a diary file for events
-that apply to all of them.  Lines in the diary file of this form:
-
-@smallexample
-#include "@var{filename}"
-@end smallexample
-
-@noindent
-includes the diary entries from the file @var{filename} in the fancy
-diary buffer.  The include mechanism is recursive, so that included files
-can include other files, and so on; you must be careful not to have a
-cycle of inclusions, of course.  Here is how to enable the include
-facility:
-
-@vindex list-diary-entries-hook
-@vindex mark-diary-entries-hook
-@findex include-other-diary-files
-@findex mark-included-diary-files
-@smallexample
-(add-hook 'list-diary-entries-hook 'include-other-diary-files)
-(add-hook 'mark-diary-entries-hook 'mark-included-diary-files)
-@end smallexample
-
-The include mechanism works only with the fancy diary display, because
-ordinary diary display shows the entries directly from your diary file.
-
-@node Sexp Diary Entries
-@section Sexp Entries and the Fancy Diary Display
-@cindex sexp diary entries
-
-  Sexp diary entries allow you to do more than just have complicated
-conditions under which a diary entry applies.  If you use the fancy
-diary display, sexp entries can generate the text of the entry depending
-on the date itself.  For example, an anniversary diary entry can insert
-the number of years since the anniversary date into the text of the
-diary entry.  Thus the @samp{%d} in this dairy entry:
-
-@findex diary-anniversary
-@smallexample
-%%(diary-anniversary 10 31 1948) Arthur's birthday (%d years old)
-@end smallexample
-
-@noindent
-gets replaced by the age, so on October 31, 1990 the entry appears in
-the fancy diary buffer like this:
-
-@smallexample
-Arthur's birthday (42 years old)
-@end smallexample
-
-@noindent
-If the diary file instead contains this entry:
-
-@smallexample
-%%(diary-anniversary 10 31 1948) Arthur's %d%s birthday
-@end smallexample
-
-@noindent
-the entry in the fancy diary buffer for October 31, 1990 appears like this:
-
-@smallexample
-Arthur's 42nd birthday
-@end smallexample
-
-  Similarly, cyclic diary entries can interpolate the number of repetitions
-that have occurred:
-
-@findex diary-cyclic
-@smallexample
-%%(diary-cyclic 50 1 1 1990) Renew medication (%d%s time)
-@end smallexample
-
-@noindent
-looks like this:
-
-@smallexample
-Renew medication (5th time)
-@end smallexample
-
-@noindent
-in the fancy diary display on September 8, 1990.
-
-  There is an early reminder diary sexp that includes its entry in the
-diary not only on the date of occurrence, but also on earlier dates.
-For example, if you want a reminder a week before your anniversary, you
-can use
-
-@findex diary-remind
-@smallexample
-%%(diary-remind '(diary-anniversary 12 22 1968) 7) Ed's anniversary
-@end smallexample
-
-@noindent
-and the fancy diary will show
-@smallexample
-Ed's anniversary
-@end smallexample
-@noindent
-both on December 15 and on December 22.
-
-@findex diary-date
-  The function @code{diary-date} applies to dates described by a month,
-day, year combination, each of which can be an integer, a list of
-integers, or @code{t}. The value @code{t} means all values.  For
-example,
-
-@smallexample
-%%(diary-date '(10 11 12) 22 t) Rake leaves
-@end smallexample
-
-@noindent
-causes the fancy diary to show
-
-@smallexample
-Rake leaves
-@end smallexample
-
-@noindent
-on October 22, November 22, and December 22 of every year.
-
-@findex diary-float
-  The function @code{diary-float} allows you to describe diary entries
-that apply to dates like the third Friday of November, or the last
-Tuesday in April.  The parameters are the @var{month}, @var{dayname},
-and an index @var{n}. The entry appears on the @var{n}th @var{dayname}
-of @var{month}, where @var{dayname}=0 means Sunday, 1 means Monday, and
-so on.  If @var{n} is negative it counts backward from the end of
-@var{month}.  The value of @var{month} can be a list of months, a single
-month, or @code{t} to specify all months.  You can also use an optional
-parameter @var{day} to specify the @var{n}th @var{dayname} of
-@var{month} on or after/before @var{day}; the value of @var{day} defaults
-to 1 if @var{n} is positive and to the last day of @var{month} if
-@var{n} is negative.  For example,
-
-@smallexample
-%%(diary-float t 1 -1) Pay rent
-@end smallexample
-
-@noindent
-causes the fancy diary to show
-
-@smallexample
-Pay rent
-@end smallexample
-
-@noindent
-on the last Monday of every month.
-
-  The generality of sexp diary entries lets you specify any diary
-entry that you can describe algorithmically.  A sexp diary entry
-contains an expression that computes whether the entry applies to any
-given date.  If its value is non-@code{nil}, the entry applies to that
-date; otherwise, it does not.  The expression can use the variable
-@code{date} to find the date being considered; its value is a list
-(@var{month} @var{day} @var{year}) that refers to the Gregorian
-calendar.
-
-  The sexp diary entry applies to a date when the expression's value
-is non-@code{nil}, but some values have more specific meanings.  If
-the value is a string, that string is a description of the event which
-occurs on that date.  The value can also have the form
-@code{(@var{mark} . @var{string})}; then @var{mark} specifies how to
-mark the date in the calendar, and @var{string} is the description of
-the event.  If @var{mark} is a single-character string, that character
-appears next to the date in the calendar.  If @var{mark} is a face
-name, the date is displayed in that face.  If @var{mark} is
-@code{nil}, that specifies no particular highlighting for the date.
-
-  Suppose you get paid on the 21st of the month if it is a weekday, and
-on the Friday before if the 21st is on a weekend.  Here is how to write
-a sexp diary entry that matches those dates:
-
-@smallexample
-&%%(let ((dayname (calendar-day-of-week date))
-         (day (car (cdr date))))
-      (or (and (= day 21) (memq dayname '(1 2 3 4 5)))
-          (and (memq day '(19 20)) (= dayname 5)))
-         ) Pay check deposited
-@end smallexample
-
-  The following sexp diary entries take advantage of the ability (in the fancy
-diary display) to concoct diary entries whose text varies based on the date:
-
-@findex diary-sunrise-sunset
-@findex diary-phases-of-moon
-@findex diary-day-of-year
-@findex diary-iso-date
-@findex diary-julian-date
-@findex diary-astro-day-number
-@findex diary-hebrew-date
-@findex diary-islamic-date
-@findex diary-french-date
-@findex diary-mayan-date
-@table @code
-@item %%(diary-sunrise-sunset)
-Make a diary entry for the local times of today's sunrise and sunset.
-@item %%(diary-phases-of-moon)
-Make a diary entry for the phases (quarters) of the moon.
-@item %%(diary-day-of-year)
-Make a diary entry with today's day number in the current year and the number
-of days remaining in the current year.
-@item %%(diary-iso-date)
-Make a diary entry with today's equivalent ISO commercial date.
-@item %%(diary-julian-date)
-Make a diary entry with today's equivalent date on the Julian calendar.
-@item %%(diary-astro-day-number)
-Make a diary entry with today's equivalent astronomical (Julian) day number.
-@item %%(diary-hebrew-date)
-Make a diary entry with today's equivalent date on the Hebrew calendar.
-@item %%(diary-islamic-date)
-Make a diary entry with today's equivalent date on the Islamic calendar.
-@item %%(diary-french-date)
-Make a diary entry with today's equivalent date on the French Revolutionary
-calendar.
-@item %%(diary-mayan-date)
-Make a diary entry with today's equivalent date on the Mayan calendar.
-@end table
-
-@noindent
-Thus including the diary entry
-
-@example
-&%%(diary-hebrew-date)
-@end example
-
-@noindent
-causes every day's diary display to contain the equivalent date on the
-Hebrew calendar, if you are using the fancy diary display.  (With simple
-diary display, the line @samp{&%%(diary-hebrew-date)} appears in the
-diary for any date, but does nothing particularly useful.)
-
-  These functions can be used to construct sexp diary entries based on
-the Hebrew calendar in certain standard ways:
-
-@cindex rosh hodesh
-@findex diary-rosh-hodesh
-@cindex parasha, weekly
-@findex diary-parasha
-@cindex candle lighting times
-@findex diary-sabbath-candles
-@cindex omer count
-@findex diary-omer
-@cindex yahrzeits
-@findex diary-yahrzeit
-@table @code
-@item %%(diary-rosh-hodesh)
-Make a diary entry that tells the occurrence and ritual announcement of each
-new Hebrew month.
-@item %%(diary-parasha)
-Make a Saturday diary entry that tells the weekly synagogue scripture reading.
-@item %%(diary-sabbath-candles)
-Make a Friday diary entry that tells the @emph{local time} of Sabbath
-candle lighting.
-@item %%(diary-omer)
-Make a diary entry that gives the omer count, when appropriate.
-@item %%(diary-yahrzeit @var{month} @var{day} @var{year}) @var{name}
-Make a diary entry marking the anniversary of a date of death.  The date
-is the @emph{Gregorian} (civil) date of death.  The diary entry appears
-on the proper Hebrew calendar anniversary and on the day before.  (In
-the European style, the order of the parameters is changed to @var{day},
-@var{month}, @var{year}.)
-@end table
-
-  All the functions documented above take an optional argument
-@var{mark} which specifies how to mark the date in the calendar display.
-If one of these functions decides that it applies to a certain date,
-it returns a value that contains @var{mark}.
-
-@node Appt Customizing
-@section Customizing Appointment Reminders
-
-  You can specify exactly how Emacs reminds you of an appointment, and
-how far in advance it begins doing so, by setting these variables:
-
-@vindex appt-message-warning-time
-@vindex appt-audible
-@vindex appt-visible
-@vindex appt-display-mode-line
-@vindex appt-msg-window
-@vindex appt-display-duration
-@vindex appt-disp-window-function
-@vindex appt-delete-window-function
-@table @code
-@item appt-message-warning-time
-The time in minutes before an appointment that the reminder begins.  The
-default is 12 minutes.
-@item appt-audible
-If this is non-@code{nil}, Emacs rings the
-terminal bell for appointment reminders.  The default is @code{t}.
-@item appt-visible
-If this is non-@code{nil}, Emacs displays the appointment
-message in the echo area.  The default is @code{t}.
-@item appt-display-mode-line
-If this is non-@code{nil}, Emacs displays the number of minutes
-to the appointment on the mode line.  The default is @code{t}.
-@item appt-msg-window
-If this is non-@code{nil}, Emacs displays the appointment
-message in another window.  The default is @code{t}.
-@item appt-disp-window-function
-This variable holds a function to use to create the other window
-for the appointment message.
-@item appt-delete-window-function
-This variable holds a function to use to get rid of the appointment
-message window, when its time is up.
-@item appt-display-duration
-The number of seconds to display an appointment message.  The default
-is 10 seconds.
-@end table
-
-@ignore
-   arch-tag: 8e50c766-4703-4888-a421-af15244cca7e
-@end ignore