normanvalentineFiling the corners off my MacBooks
Not all heroes wear capes. This is excellent and can't wait to get aluminium mac next to try it – don't think Space Black is a good way to go.
Author's another post on "The Seasons are Wrong" [0] is excellent too and I fully support both approaches.
The seasons idea is interesting -- to me, both proposals feel wrong. I think it's because the weather changes that I perceive seem to lag behind the changes to daylight length by a few weeks.
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.
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.