There are TZ rules that do all sorts of wild things.

Leading to my favourite web comic of all time.

https://www.monkeyuser.com/2018/going-global/

Monkey User is always entertaining.

Is there any other person other than Arthur David Olson who needed an RFC written to cover their retirement?

https://www.rfc-editor.org/rfc/rfc6557.html

Jon Postel, the original RFC Editor and IANA: https://www.rfc-editor.org/rfc/rfc2468

Brazil not only had DST at midnight, but until 2008 they also had no standard rule for when DST would begin and end, setting the dates by decree often just a few weeks in advance.

Kind of funny that it went from a Ramadan model to an Easter-post-computus model

https://en.wikipedia.org/wiki/Ramadan#Beginning https://en.wikipedia.org/wiki/Date_of_Easter

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https://www.timeanddate.com/time/time-zones-interesting.html

I wonder how on earth do you deal with a 30 or 45 minute offset in real life