The Julian calendar, which the Gregorian is a revision of, was designed precisely so that societies didn't need a public servant dedicated to keeping the calend

The Julian calendar, which the Gregorian is a revision of, was designed precisely so that societies didn't need a public servant dedicated to keeping the calendar up to date. >For example, the first day of Fall is actually the first day of "Mehr" (the 7th month). For some reason, the Gregorian calendar has it on Sep. 22. The particular locations of the equinoxes and solstices on the calendar isn't as important as keeping them more or less in the same places as time goes on.