* Other Calendars:: Converting dates to other calendar systems.
* Diary:: Displaying events from your diary.
* Appointments:: Reminders when it's time to do something.
+* iCalendar:: Converting diary events to/from iCalendar format.
* Daylight Savings:: How to specify when daylight savings time is active.
* Time Intervals:: Keeping track of time intervals.
@end menu
list without affecting your diary file. You delete entries from the
appointment list with @kbd{M-x appt-delete}.
+@node iCalendar
+@section iCalendar
+@cindex iCalendar support
+
+ The icalendar package aims at providing an implementation of the
+iCalendar standard, as defined in ``RFC 2445 -- Internet Calendaring and
+Scheduling Core Object Specification (iCalendar)''. It provides a means
+for importing iCalendar (and the earlier vCalendar format) data into
+Emacs diary files and vice versa.
+
+ Importing works for ``ordinary'' (i.e. non-recurring) events, but (at
+present) may not work correctly (if at all) for recurring events.
+Exporting of diary files into iCalendar files should work correctly for
+most diary entries. Please note that @file{icalendar.el} is work in
+progress, so usage may evolve in future.
+
+ To activate the package, use @code{(require 'icalendar)}.
+
+@findex icalendar-import-buffer
+ The command @code{icalendar-import-buffer} extracts
+iCalendar data from the current buffer and adds it to your (default)
+diary file. This function is also suitable for automatic extraction of
+iCalendar data; for example with the Rmail mail client one could use:
+
+@example
+(add-hook 'rmail-show-message-hook 'icalendar-import-buffer)
+@end example
+
+@findex icalendar-import-file
+ The command @code{icalendar-import-file} imports an iCalendar file
+and adds the results to an Emacs diary file. For example:
+
+@example
+(icalendar-import-file "/here/is/calendar.ics" "/there/goes/ical-diary")
+@end example
+
+@noindent
+You can use an @code{#include} directive to add the import file contents
+to the main diary file, if these are distinct. @xref{Fancy Diary
+Display,,, elisp, The Emacs Lisp Reference Manual}.
+
+@findex icalendar-export-file, icalendar-export-region
+ Use @code{icalendar-export-file} to interactively export an entire
+Emacs diary file to iCalendar format. To export only a part of a diary
+file, mark the relevant area, and call @code{icalendar-export-region}.
+In both cases the result is appended to the target file.
+
+
@node Daylight Savings
@section Daylight Savings Time
@cindex daylight savings time