I’ll start with a couple I’ve found for keeping up with atomic clock time, but this question isn’t limited to timekeeping, it can also relate to celestial events, weather, etc…
I do like the sleek and streamlined time.ms site, but according to their whois data, they only started that site a couple months ago, while time.gov has been around since 1999.
Long standing sites are preferable, but either way, what other live data sites do you people recommend?
nullschool. By default, it shows air currents at surface level. You can also see some chemical levels on the atmosphere, like carbon monoxide, carbon dioxide; see ocean currents and waves, as well as temperature.
https://earth.nullschool.net/#current/wind/surface/level/orthographic