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
There are 25 integer World Time Zones from -12 through 0 (GMT) to +12. Each
one is 15° of Longitude as measured East and West from the Prime Meridian of
the World at Greenwich, England. Some countries have adopted non-standard
time zones, usually 30 minutes offset which have a * designation.
Each Time Zone is measured relative to Greenwich, England. There are both
civilian designations which are typically three letter abbreviations (e.g. EST)
for most time zones. In addition there are military designations. These use each
letter of the alphabet (except 'J') and are known by their phonetic equivalent.
E.G. Greenwich Mean Time (civilian) or Z = Zulu (military and aviation).
For complete details of
Daylight saving (Summer) Time see
here
Standard Time Zones
Note: cities in italics operate Daylight Saving Time during Summer
months
