Disadvantages of having a physics degree & being a bit of a timekeeping nerd:
You know that most of the time when programmers are talking about UTC timestamps they actually mean UT1. (Except NTP. NTP is also developed by timekeeping nerds)
RE: https://akko.erincandescent.net/objects/874224bb-0390-4b06-9095-37e6cc6118ce