I'm now a bit worried about this paragraph in
(info "(emacs) Appointments"):

|    You can write times in am/pm style (with ‘12:00am’ standing for
| midnight and ‘12:00pm’ standing for noon), or 24-hour European/military
| style.  You need not be consistent; your diary file can have a mixture
| of the two styles.  Times must be at the beginning of diary entries if
| they are to be recognized.

Military style is 1200 for 12:00am, right?  This definitely can't be
used everywhere when using the European style because lines get
ambiguous: for digits could mean a year - or a military time in a line
not specifying a year.  Should that paragraph be corrected?

Michael.