Ocean currents, elevation and distance from the equator also have a big impact on what the season is going to feel like.

There's no need to change the dates. They're already arbitrary based on the position of the sun and the earth and people have the experience to take them with the grain of salt necessary to the region they live in. People who live near the equator probably don't have much care for the notion of the winter at all. Folks who live far up north know that spring actually comes in much later than march 21st. People who climb glaciated mountains in the canadian rockies know they won't get summer conditions until late june.

That's how it works in Australia, though rotated six months: Summer starts December 1, Autumn starts March 1, Winter starts June 1, and Spring starts September 1. I think it even has legal status. In the North of the country though they typically just use wet and dry season.

I've also always thought that the equinoxes and solstices should be the middle of the seasons, so using the 'cross-quarter' days as the beginning of seasons makes more sense.

Forcing seasons into chunks of equal duration also feels wrong, to me but also anyone I recall having a conversation with so seeing every HN comment assuming all seasons are 3 months long is somewhat perplexing.

In my country the dates you stated are what are considered the start of the seasons. This year there was a very clear change between winter and spring on March 1st. February was cloudy and minus, March was sunny and plus.

funny how this is actually the default for me having grown up in Ukraine.

probably same for other post-soviet countries too?

I second this proposal. Three weeks shift can feel about right.

But we lost a lot of nice symmetries that way, which is unfortunate

> I would propose boundaries that align partly with how I perceive the weather, and partly with how we plan our year (by months): Summer starts June 1st, Fall starts September 1st, Winter starts December 1st, and Spring starts March 1st.

You do realize there's also a southern hemisphere on planet Earth?