When Do The Four Seasons Start And End [upd] 99%

To visualize the stark difference between the two systems, here is a side-by-side breakdown of the season dates for the Northern Hemisphere.

In the meteorological system, yes – the 1st. In the astronomical system, the 20th or 21st is typical (except for winter, which often starts on the 21st or 22nd). when do the four seasons start and end