on timezone oddities, and how programmers cope with them: https://ssoready.com/blog/engineering/truths-programmers-timezones/

I was interested to learn that leap seconds are to be retired in favour of "leap smearing", in which NTP clocks run more slowly around the time of the leap second. in one proposed solution, the last minute of the day will take a full two minutes to elapse. 🤯 https://en.wikipedia.org/wiki/Leap_second#Future_of_leap_seconds