Another interesting fact I've heard about the solsctices and equinoxes is that they should actually be the middle of the respective season due to the length of the day, but they're not because of Seasonal Lag.
That's why people traditionally defined the seasons as beginning in their equinox or solstice, and why modern meteorologists define meteorological Winter as the coldest 3 months, meteorological Summer as the hottest 3, and meteorological Spring/Autumn as the corresponding gaps.
The one exception to those definitions is in tropical climates and South(east) Asia.
TLDR: Winter should be NDJ, Spring FMA, Summer MJJ, and Autumn ASO. However, people traditionally went/go by Winter JFM, Spring AMJ, Summer JAS, and Autumn OND. Weather people go by Winter DJF, Spring MAM, Summer JJA, and Autumn SON.
(If you live in the Southern Hemisphere, months stay the same but seasons are changed to opposites.)
For those of you who want to get even more info and/or debate, I made a thread (Miscellaneous forum section) for that very recently.
For those of you who don't know, which most of you probably do, I'm We3_10AC's public alt who is way more active on forums. But I use my main to post statuses and my main is older on EMC.
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