25-Hour Time (and the Secret Third Half of the Day) (opens in new tab)

you know how if you're up past midnight, on some level it's still the same day until you go to bed, no matter what the calendar says? well, if you've ever wished that there was notation to unambiguously refer to a current date and time when the current date is somewhat vibes-based, you're actually in luck, because this is a solved problem, although depending on your preferred time notation it may require some creative extension.