Summer & Winter Time
UK Time / British Time
UK TIme – England, Wales, Scotland, Northern Ireland
British Summer Time 2010 – 2012
UK Time in the West European time zone (Western European Time Zone). Just like other European countries, Summer (Daylight–Saving) Time enforced in the UK, where the time forward one hour (GMT + 1). After the Summer, when UK Time shifted back one hour to Western European Time (WET) or (GMT).
watch method slide table below:
Daylight Saving Time starts
25 Mar |
When local standard time is about to reach Sunday, 25 March 2012, 01:00:00 clocks are turned forward 1 hour to Sunday, 25 March 2012, 02:00:00 local daylight time instead
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Daylight Saving Time ends
28 Oct |
When local daylight time is about to reach Sunday, 28 October 2012, 02:00:00 clocks are turned backward 1 hour to Sunday, 28 October 2012, 01:00:00 local standard time instead
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Formula to calculate the start of the European Summer Time [2]:
Sunday (31 − ((((5 * y) ÷ 4) + 4) mod 7)) March at 01:00 GMT
Formula to calculate the expiration European Summer Time [2]:
Sunday (31 − ((((5 * y) ÷ 4) + 1) mod 7)) October at 01:00 GMT
Note:
Both of the formula above is valid up to 2099.
y is year, and for non-negative a, a mod b is residual division after subtraction both operand to be integer.
The formula be obtained from European Summer Time data until 2015 :
Tahun |
BST Mulai |
BST Berakhir |
2010 |
Sunday, 28 March | Sunday, 31 October |
2011 |
Sunday, 27 March | Sunday, 30 October |
2012 |
Sunday, 25 March | Sunday, 28 October |
2013 |
Sunday, 31 March | Sunday, 27 October |
2014 |
Sunday, 30 March | Sunday, 26 October |
2015 |
Sunday, 29 March | Sunday, 25 October |
Source :
[1] http://wwp.greenwich-mean-time.eu/time-zone/europe/uk/time/
[2] http://en.wikipedia.org/wiki/European_Summer_Time
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Daylight Saving Time – North America
USA – United States of America, Canada, Mexico
Daylight Saving Time Schedule USA 2007 – 2015
As prescribed: The Energy Policy Act of 2005
Rules
Begining : Second week in March
Ending : First week in November
Time : 2 am local time (14:00 wib)
Starting from 2007, Daylight Saving Time (DST) was extended for a month and a schedule of countries the United States are adopting DST will be:
2 am (14:00 wib) 2nd week in March until 2 am (14:00 wib) first week in November.
Berikut tabelnya:
Years |
DST Starting from at 2 a.m. |
DST Ending at 2 a.m. |
2007 |
March 11 | November 4 |
2008 |
March 9 | November 2 |
2009 |
March 8 | November 1 |
2010 |
March 14 | November 7 |
2011 |
March 13 | November 6 |
2012 |
March 11 | November 4 |
2013 |
March 10 | November 3 |
2014 |
March 9 | November 2 |
2015 |
March 8 | November 1 |
Compiled by :
Research Team