DST is a sad reminder that humans aren't rational
The US switched to DST Sunday, 11 March. Most European countries make the switch on Sunday, 25 March. I have to carefully keep track of which weekly conference calls are scheduled based on which time zone for the next two weeks. I'll probably mess it up a few times. 
SORRY!
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You should try living in the Southern Hemisphere, where the change is in the opposite direction – e.g. clocks *back* an hour for winter on the first Sunday in April. (April 1, this year)
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Moving from east coast to west coast. I only realize how commonly confusing time zones are with literally half my east coast contacts adding 3 hours. I think International DST mess ups are fine. It will be huge when more US states remove or keep DST permanently.
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http://timeanddate.com meeting planner is fantastic.
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