# Birthdays.  The 0 means "every year".
0/1/1 And a happy new year
0/5/10 My birthday.  Send gifts.
0/9/22 htmlcal first written this day in 2001.

# monthly events; the zeroes mean "every"
0/0/3 Pay credit card bills
0/0/18 Pay rent.

# temporary events
2001/10/5 Here's a one-off event.
2001/10/8 Here is the first of two...
2001/10/8 ...on the same day.