Yu-Shan Fung
Thinker and Builder. Crazy about data, personalization and relevance. Creator of @MrTweet. Engineer @Google

This is for participating locations in North America only. Arizona, Saskatchewan, Sonora, Greenland, Hawaii, and various islands off North America do not observe the time change.

And while you're changing your clocks, remember to check your smoke detector batteries. One third of all smoke detectors have dead, near dead or disconnected...