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   Summer begin clock  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 Seconds before and after the time change forward Local Date Local Time DST UTC Offset Time Zone Sunday, 25 March 2012 00:59:57 No UTC GMT   00:59:58 No UTC GMT   00:59:59 No UTC GMT   01:00:00 → 02:00:00 +1h UTC+1h BST   02:00:01 +1h UTC+1h BST   02:00:02 +1h UTC+1h BST
Daylight Saving Time ends 28 Oct   Summer end clock  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 Seconds before and after the time change backward Local Date Local Time DST UTC Offset Time Zone Sunday, 28 Oct 2012 01:59:57 +1h UTC+1h BST   01:59:58 +1h UTC+1h BST   01:59:59 +1h UTC+1h BST   02:00:00 → 01:00:00 No UTC GMT   01:00:01 No UTC GMT   01:00:02 No UTC GMT

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 :

TahunBST MulaiBST Berakhir
2010Sunday, 28 MarchSunday, 31 October
2011Sunday, 27 MarchSunday, 30 October
2012Sunday, 25 MarchSunday, 28 October
2013Sunday, 31 MarchSunday, 27 October
2014Sunday, 30 MarchSunday, 26 October
2015Sunday, 29 MarchSunday, 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.
(2nd Maret)
DST Ending at 2 a.m.
(2nd Week November)
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