A timestamp is a specification of a date (possibly with a time or a range of times) in a special format, either ‘<2003-09-16 Tue>’ or ‘<2003-09-16 Tue 09:39>’ or ‘<2003-09-16 Tue 12:00-12:30>’. A timestamp can appear anywhere in the headline or body of an Org tree entry. Its presence causes entries to be shown on specific dates in the agenda (see Weekly/daily agenda). We distinguish:
Plain timestamp; Event; Appointment
A simple timestamp just assigns a date/time to an item. This is just like writing down an appointment or event in a paper agenda.
* Meet Peter at the movies <2006-11-01 Wed 19:15> * Discussion on climate change <2006-11-02 Thu 20:00-22:00>
Timestamp with repeater interval
A timestamp may contain a repeater interval, indicating that it applies not only on the given date, but again and again after a certain interval of N days (d), weeks (w), months (m), or years (y). The following will show up in the agenda every Wednesday:
* Pick up Sam at school <2007-05-16 Wed 12:30 +1w>
Diary-style sexp entries
For more complex date specifications, Org mode supports using the special sexp diary entries implemented in the Emacs calendar/diary package. For example
* The nerd meeting on every 2nd Thursday of the month <%%(diary-float t 4 2)>
Two timestamps connected by ‘--’ denote a range.
** Meeting in Amsterdam <2004-08-23 Mon>--<2004-08-26 Thu>
Just like a plain timestamp, but with square brackets instead of angular ones. These timestamps are inactive in the sense that they do not trigger an entry to show up in the agenda.
* Gillian comes late for the fifth time [2006-11-01 Wed]