USA, Canada clocks on Daylight Saving Time until 4 November 2012 at 2am local time
UK / Europe: Clocks on Summer Time until: Sunday 28 October 2012 01:00 (1am) GMT
London Time is the same as
Greenwich Mean Time less than half of the year. During Summer Time (Daylight Saving Time), London Time is
GMT+1, also known as
British Summer Time (BST).
Greenwich Mean Time (GMT) was established in 1884 at the International Meridian Conference, when it
was decided to the place the Prime Meridian at Greenwich, England.