MSN Tech & Gadgets has an article this week, "Time to Reset," on preparing for daylight saving time. (See http://tech.msn.com/howto/article.aspx?cp-documentid=3318115.)
"For example, London will be four hours ahead of New York, not the usual five, for two weeks beginning March 11. But when London springs ahead on March 25, the normal time gap will return.
"Closer to home: Even if your desktop calendar works properly, is your dentist aware of the change? Call ahead and ask.
"If the security system at work is programmed to automatically unlock the doors at 9 a.m., will they be locked when you arrive? Bring a book, just in case."