User Tip: Make an recurring appointment on the last *day of the month

[John McGivney]

If you want to make an appointment recurring on a certain weekday of the month - watch out for months in which the day only occurs 4 times (day can occur 4 or 5 times in a month).

For example, 7/28/2012 is the 4th and last Saturday of July 2012. If you have an appointment on 7/28 and want it to recur on the last Saturday of the month:
1.)Create appointment on 7/28
2.)Edit 7/28 appointment, duplicate for 8/25
3.)Edit 8/25, duplicate it for 9/29, check recurring then choose monthly, last Saturday of the month

GCal does not seem to have the ability to choose 4th vs last day of month . Maybe this will be a feature some day!