Oct 312011

If you’re in the USA, don’t forget to change your clock(s) at 2 a.m. on the first Sunday of November, unless your state doesn’t follow the daylight saving time standard. Many people use the mnemonic “Spring up – Fall back” to remember whether to move clocks back or forth when due. Also, it’s good to set your mobile phone to network time or automatic, if it has that option in its settings, and it should change automatically.

The USA daylight saving time begins on the second Sunday of March and ends on the first Sunday of November (the rules were last changed in 2007).

In most European countries DST starts on the last Sunday of March and ends on the last Sunday of October, while most Asian countries don’t have this rule at all. Here’s a Wikipedia article showing the rules and history of daylight saving time in each country.

This Fall (2011) our “fallback” time in the USA falls on November 6. This is not an error – I’m intentionally repeating the word “fall” to help you program your brain to fall back this Fall. By the way, that’s five days before 11/11/11, the insignificant, but interesting date. We have only one more date like this remaining in this century, which is on the 12/12/12, and then we have to wait for 01/01/01 of the 2100’s.

In 2012, the USA daylight saving time begins on March 11 and ends on November 4 (again, this is for 2012, so don’t use this for 2011). As always, on the day of change to standard time all the minutes between 1 a.m. and 1:59 a.m. will flow twice, in other words we are getting one extra hour in the Fall and lose one hour in the Spring each time this change occurs.

I don’t understand why the official time change doesn’t happen on Saturday mornings, which would make it a bit easier for most people who don’t work on weekends. I used to change my clocks at home on Friday evening to help my body get used to the new schedule before going to work on Monday.

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