The UK changes over to British Summer Time tonight, so we get a hour less in bed, but it is lighter in the evenings.
I change all clocks in the house except the one in the shack that stays on GMT. For a few days, I tend to forget and enter my log an hour wrong! Habit. I always keep my log in GMT although in the UK it is no longer compulsory to keep a log. I still like to keep a paper log of the more important QSOs