Time Zones

A variety of useful time-zone-related information is available on the Web at www.timeanddate.com. The following is a list of time zone abbreviations:

• Standard
	• UTC	Coordinated Universal Time, civil time, the one most often used by "ordinary" people
	• UT	Universal Time, based on the Earth's rotation, often used in Astronomy
	• TAI	International Atomic Time, based on atomic clocks
• European
	• GMT	Greenwich Mean Time, as UTC
	• BST	British Summer Time, as UTC + 1 hour
	• IST	Irish Summer Time, as UTC + 1 hour
	• WET	Western Europe Time, as UTC
	• WEST	Western Europe Summer Time, as UTC + 1 hour
	• CET	Central Europe Time, as UTC + 1
	• CEST	Central Europe Summer Time, as UTC + 2
	• EET	Eastern Europe Time, as UTC + 2
	• EEST	Eastern Europe Summer Time, as UTC + 3
	• MSK	Moscow Time, as UTC + 3
	• MSD	Moscow Summer Time, as UTC + 4
• U.S. and Canada
	• AST	Atlantic Standard Time, as UTC - 4 hours
	• ADT	Atlantic Daylight Time, as UTC - 3 hours
	• EST	Eastern Standard Time, as UTC - 5 hours
	• EDT	Eastern Daylight Saving Time, as UTC - 4 hours
	• ET	Eastern Time, either as EST or EDT, depending on place and time of year
	• CST	Central Standard Time, as UTC - 6 hours
	• CDT	Central Daylight Saving Time, as UTC - 5 hours
	• CT	Central Time, either as CST or CDT, depending on place and time of year
	• MST	Mountain Standard Time, as UTC - 7 hours
	• MDT	Mountain Daylight Saving Time, as UTC - 6 hours
	• MT	Mountain Time, either as MST or MDT, depending on place and time of year
	• PST	Pacific Standard Time, as UTC - 8 hours
	• PDT	Pacific Daylight Saving Time, as UTC - 7 hours
	• PT	Pacific Time, either as PST or PDT, depending on place and time of year
	• HST	Hawaiian Standard Time, as UTC - 10 hours
	• AKST	Alaska Standard Time, as UTC - 9 hours
	• AKDT	Alaska Standard Daylight Saving Time, as UTC - 8
• Australia
	• AEDT	Australian Eastern Daylight Time, as UTC + 11 hours
	• ACST	Australian Central Standard Time, as UTC + 9.5 hours
	• ACDT	Australian Central Daylight Time, as UTC + 10.5 hours
	• AWST	Australian Western Standard Time, as UTC + 8 hours