I am fortunate enough to have a radio-controlled clock. I needn't worry about the exact dates of these clock adjustment days: I merely adjust my self-timing clocks to match the radio one whenever I notice a discrepancy between them.
Funnily enough it actually got me pretty good this year because of expo.Me and my friends were hanging out in our hotel room after midnight watching Q.I after the saturday night party when we checked the clocks,only to find that for some reason it was an hour earlier than expected.Due to our tiredness,none of us realised why until Sunday morning^_^;.
Michael McIntyre does a good job of explaining the hysteria surrounding this, IIRC. On another note, I refuse to manually update my PS3's time. It should hurry up and just let the internet inside it today so it can change.