i was going to shitpost about how we need timezone reform in the form of a return to local solar time, but then i went down a wikipedia rabbithole for some background and now i just have a non-shitpost about how this entire entry is fascinating:
https://en.wikipedia.org/wiki/Solar_time#Apparent_solar_time
"Since sometime in the late 20th century, Earth's rotation has been defined relative to an ensemble of extra-galactic radio sources and then converted to mean solar time by an adopted ratio."