This is really no more than a minor nuisance, but my system clock reverts from 'Summer time' to 'Winter time' every time I boot. I live in the UK which I believe is the home of 'Summer time' invented during WW1, but.
Win 7 HP 64 bit, ASUS mobo, 4GB RAM, desktop
Going into clock settings, the date is correct, the time zone is correct (UTC, London, Dublin, etc.), it tells me Summer time will end at the end of October and that it will notify me when it changes. I can change the time to the correct one, the next time I boot into Windows it has gone back again. Oddly, this doesn't seem to happen in Linux. If I boot into Linux the clock doesn't change, but does when I boot back into Windows. If it is of any relevance I also run FLux but the location set there is correct, in fact it was this that led me to look at the clock.
The CMOS battery is obviously the first thought, but this one is fairly new.It's been installed for about a year. Any other ideas ?