Tuesday October 14, 2003

24-hour clocks

I prefer digital clocks that show the time in 24 (unique) hourly numbers, from 00:59 - 23:59. Unfortunately, many alarm clocks in the U.S. don't do this. Has it ever occurred to you, however, that all digital clocks are "24 hour clocks"?

An analog clock (you remember, the old-fashioned circular faces with the hands? :-) is really a 12-hour clock. The hands go from 12:00 to 11:59 and then they do it again. If you set the clock for 3:15, doesn't matter "which" 3:15 it is, the clock will work. The alarm will work. The only drawback is you can't set an alarm more than 12 hours in advance.

A digital clock, however, fools you. The numbers go from 12:00 to 11:59 and repeat, but in the second pass there's usually some sort of teensy tinsy symbol to indicate that it's now pm (or perhaps am).

Our alarm clock didn't go off this morning. It was set for 8:30, to give Rich plenty of time to get up and be at his new contract by 10:00. Unfortunately, although the alarm was correctly set for 8:30 am, the clock itself had gotten misadjusted after a temporary power failure and was now off by 12 hours. So, at half past eight this morning the clock thought it was 8:30 pm. We woke up an hour later. Rich wasn't very late leaving the house, but neither did he have much time to get ready.

The next alarm clock I get is going to be a real 24-hour clock that uses 24 numbers for the hours, not some itty bitty red dot :-(

24-hour clocks ( in category Random Thoughts ) - posted at Tue, 14 Oct, 15:26 Pacific