When I was small, my mum used to pack winter clothes away in the spring and bring out summer clothes - and vice versa in the fall. I'm from up north (way up north), so it made sense as we had proper snow gear etc.
My DH (from London) and friends (mainly Londoners too) think this is really odd behaviour. Obviously I have some stuff for all seasons but knitted dresses, thick scarves and woolly socks get boxed up around Easter, and strapless dresses and sandals brought out. It means everything gets looked at too in case it's no longer needed/liked, and aired outside. Is it just me?
(I've also just packed away most of my work clothes as I'm only going in once a week and a few smart outfits suffice. I like a fairly empty wardrobe)