iCloud Holiday Calendar - incorrect dates (Thanksgiving on a Wednesday?)

[johnc22]

My wife and I just got new iPhone 13 Pros on T-Mobile. My wife is new to iOS and great at finding things wrong with it, specifically the calendar. One of her biggest finds is that the iCloud Holiday Calendar has everything off by a day (Halloween, Thanksgiving, Christmas Day, etc). I've found anecdotal posts across the internet that this might be a time zone issue. I've confirmed that my phone is correctly detecting Eastern (New York, and we're in Atlanta), and that the override time zone setting is off in the calendar. After confirming these two settings, and doing a hard reset, the calendar is still wrong. Is this a time zone bug, a calendar bug, an iCloud data issue... ?

 

[hg.wells]

Are you just using iCloud or are you using any other providers for email / calendars?

I’ve only got iCloud setup and mine is showing as the correct date.

 

[0128672]

Same here. iCloud US holidays show correctly.

 

[johnc22]

Yeah, not sure what's going on. I'm going to look for a way to reset iCloud calendars.

 

[johnc22]

So I removed iCloud calendars from the phone, re-added them, and now the dates are correct.

There is still an "Other" calendar called US Holidays that has incorrect holiday dates. All I can do is hide that calendar, no way to remove it.