@sdetweil said in Annual Dates are off by one day in default Calendar module:
@memphismark thanks. there were a couple more bugs related to daylight savings, and full day events.
one more fix to go in
Specifically, it was a weekly occurrence that started after 6pm on Saturdays. It worked fine any other time and DOW. It busted my brain until I solved it by doing the IDIC thing. :-)