Do not limit current-time-string to years 1000..9999.

* src/editfns.c (TM_YEAR_IN_ASCTIME_RANGE): Remove.
(Fcurrent_time_string): Support any year that is supported by the
underlying localtime representation.  Don't use asctime, as it
has undefined behavior for years outside the range -999..9999.
* doc/lispref/os.texi (Time of Day): Do not limit current-time-string
to years 1000..9999.
* etc/NEWS: Do not limit current-time-string to years 1000..9999.

2 files changed, 13 insertions, 5 deletions

diff --git a/doc/lispref/ChangeLog b/doc/lispref/ChangeLog
index c3eadfc8558..3be41afe975 100644
--- a/doc/lispref/ChangeLog
+++ b/doc/lispref/ChangeLog
@@ -1,3 +1,8 @@
+2012-05-03  Paul Eggert  <eggert@cs.ucla.edu>
+
+        * os.texi (Time of Day): Do not limit current-time-string
+        to years 1000..9999.
+
 2012-05-02  Chong Yidong  <cyd@gnu.org>
 
         * display.texi (Font Lookup):
diff --git a/doc/lispref/os.texi b/doc/lispref/os.texi
index d825a3f18c4..0fdb3e20694 100644
--- a/doc/lispref/os.texi
+++ b/doc/lispref/os.texi
@@ -1196,11 +1196,14 @@ sections.
 
 @defun current-time-string &optional time-value
 This function returns the current time and date as a human-readable
-string.  The format of the string is unvarying; the number of
-characters used for each part is always the same, so you can reliably
-use @code{substring} to extract pieces of it.  You should count
+string.  The format does not vary for the initial part of the string,
+which contains the day of week, month, day of month, and time of day
+in that order: the number of characters used for these fields is
+always the same, so you can reliably
+use @code{substring} to extract them.  You should count
 characters from the beginning of the string rather than from the end,
-as additional information may some day be added at the end.
+as the year might not have exactly four digits, and additional
+information may some day be added at the end.
 
 The argument @var{time-value}, if given, specifies a time to format
 (represented as a list of integers), instead of the current time.
@@ -2301,7 +2304,7 @@ the notification never expires.  Default value is -1.
 @item :urgency @var{urgency}
 The urgency level.  It can be @code{low}, @code{normal}, or @code{critical}.
 
-@item :action-items 
+@item :action-items
 When this keyword is given, the @var{title} string of the actions is
 interpreted as icon name.