International Calls and Meetings: Keep in mind that the United States and Canada are switching their clocks, but 180-odd other countries are sticking to their guns. If you planned an overseas call for a specific time, you may be surprised. Great Britain, for instance, does not start "summer time" until March 25. London is usually five hours ahead of the U.S. Eastern time zone; for two weeks, it will be only four hours ahead.
Video Recorders: Do you have a TiVo? Or, for that matter, an old but reliable VHS recorder? This is another case in which to be wary. Newer models may have been sent software updates online, but older ones may hiccup.
"The more connected people are, the more likely they are to see the problem," said Forrester's Hammond. "If you've TiVo'd in 'Ugly Betty' Monday night on ABC and you've got an older TV, you might end up with 'Men in Trees' instead."
IT specialists at major companies have been working long hours, updating computer networks and transmitting commands to remote computers. But the Geek Squad, an operation that fixes computers for consumers and small businesses, says it has not been getting a lot of calls.
Why not? Perhaps, they told us, not a lot of people are focusing on the issue. Or maybe, said one consultant, we're seeing a case of "Y2K backlash."
Remember back in the late 1990s as the world fretted about computers that were going to melt on the stroke of midnight Jan. 1, 2000? Billions of dollars were spent on new equipment, new software, even emergency supplies bought by people worried that modern civilization would come to a halt. NASA even had a space shuttle in orbit over Christmas, and shortened the mission just to be safe.
In the end, the clocks struck midnight, people partied, the new millennium came, and virtually nothing went wrong.