I’m kicking myself for losing track of it, but I bought an old booklet that described changes in Indiana time zones in the 50s and 60s. Different communities would observe different time zones, and sometimes a community would change zones between years.

Another weird one is American Samoa. The Uniform Time Act—which requires areas to switch to and from DST in a uniform manner—has no provisions for areas on the Southern hemisphere. So if American Samoa wanted to observe daylight savings—which they might have prior to 2021 when neighboring Independent Samoa was on DST—they would have to do so with the rest of USA, which is in their winter time.