Summer Time

Daylight Saving Time

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.

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 'i') 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

Summer Time (or Daylight-Saving) Time Zones

There are many Daylight saving Time (DST) time-zones, indexed by the zone hour value relative to both Greenwich Mean Time (GMT) and British Summer Time (BST).

Winter	Summer	Civilian Time
GMT For accurate time press here	Summer Time Time = GMT+1 To open clock in new window press here	BST - British Summer Time
Winter	Summer	Civilian Time
Summer Time Time = GMT-4 To open clock in new window press here	Summer Time - Time = GMT-3 To open clock in new window press here	ADT - Atlantic Daylight
Summer Time Time = GMT-5 To open clock in new window press here	Summer Time Time = GMT-4 To open clock in new window press here	EDT - Eastern Daylight.
Summer Time Time = GMT-6 To open clock in new window press here	Summer Time Time = GMT-5 To open clock in new window press here	CDT - Central Daylight
Summer Time Time = GMT-7 To open clock in new window press here	Summer Time Time = GMT-6 To open clock in new window press here	MDT - Mountain Daylight.
Summer Time Time = GMT-8 To open clock in new window press here	Summer Time Time = GMT-7 To open clock in new window press here	PDT - Pacific Daylight.
Summer Time Time = GMT-9 To open clock in new window press here	Summer Time Time = GMT-8 To open clock in new window press here	YDT - Yukon Daylight.
Summer Time Time = GMT-10 To open clock in new window press here	Summer Time Time = GMT-9 To open clock in new window press here	HDT - Hawaii Daylight.
Winter	Summer	Civilian Time
Summer Time Time = GMT+1 To open clock in new window press here	Summer Time Zone - Time = GMT+2 To open clock in new window press here	MEST - Middle European Summer MESZ - Middle European Summer SST - Swedish Summer FST - French Summer.