time-convert): Deprecate calls without an explicit FORM arg

* lisp/subr.el (time-convert): Deprecate calls without an explicit FORM arg.

* doc/lispref/os.texi (Time Conversion): Adjust doc accordingly.

* lisp/calendar/time-date.el (days-to-time):
* lisp/emacs-lisp/timer.el (timer-next-integral-multiple-of-time):
* lisp/gnus/nnrss.el (nnrss-normalize-date):
* lisp/epa-ks.el (epa-ks--parse-buffer): Silence corresponding warnings.

1 files changed, 4 insertions, 0 deletions

diff --git a/etc/NEWS b/etc/NEWS
index 7145a8861eb..dc8bd6ce24b 100644
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -2525,6 +2525,10 @@ patcomp.el, pc-mode.el, pc-select.el, s-region.el, and sregex.el.
 
 * Lisp Changes in Emacs 29.1
 
+** The FORM arg of 'time-convert' is mandatory.
+'time-convert' can still be called without it, as before, but the
+compiler now emits a warning about this deprecated usage.
+
 +++
 ** Emacs now supports user-customizable and themable icons.
 These can be used for buttons in buffers and the like.  See