Dates are all showing up one day off in the Birthdays calendar. Where can I edit/find the info that is feeding the Birthdays calendar? I tried in contacts but Contacts all show the correct dates.

Go to settings - mail, contacts, calendars - scroll down to the calendar settings and check that time zone support is either off or set to your correct time zone. It sounds like its currently set to the wrong one.

I have the same problem, both on my iPhone & iPad. I have checked in settings and the timezones support is off. Yet the birthdays are still 1 day late, even though I have manually changed them back to the correct date in Contacts. Any other ideas?

Tried both with time zone support and without, but still does not work.