Since nearly all computing, networking, and telecommunications realms are related to accurate timing processes, it is essential to understand the importance of time zones and proper time synchronization. The table below represents the most common time zones and their Greenwich Mean Time (GMT) offsets.
 

		GMT Offset		Acronym		Description
		[GMT-12]		IDLW		International Date Line - West
		[GMT-10]		HST		Hawaiian Standard Time
		[GMT-09]		AKST		Alaska Standard Time
		[GMT-08]		AKDT		Alaska Daylight Time
		[GMT-08]		PST		Pacific Standard Time
		[GMT-07]		PDT		Pacific Daylight Time
		[GMT-07]		MST		Mountain Standard Time
		[GMT-06]		MDT		Mountain Daylight Time
		[GMT-06]		CST		Central Standard Time
		[GMT-05]		CDT		Central Daylight Time
		[GMT-05]		EST		Eastern Standard Time
		[GMT-04]		EDT		Eastern Daylight Time
		[GMT-04]		AST		Atlantic Standard Time
		[GMT-03.5]		NST		Newfoundland Standard Time
		[GMT-03]		ADT		Atlantic Daylight Time
		[GMT-02.5]		NDT		Newfoundland Daylight Time
		[GMT-01]		WAT		West Africa Time
		[GMT+00]		GMT		Greenwich Mean Time
		[GMT+00]		UTC		Universal Time Coordinated
		[GMT+00]		WET		Western Europe Time
		[GMT+01]		BST		British Summer Time
		[GMT+01]		IST		Irish Summer Time
		[GMT+01]		WEST		Western Europe Summer Time
		[GMT+01]		CET		Central European Time
		[GMT+02]		CEST		Central European Summer Time
		[GMT+02]		SST		Swedish Summer Time
		[GMT+02]		FST		French Summer Time
		[GMT+02]		CAT		Central African Time
		[GMT+02]		SAST		South African Standard Time
		[GMT+02]		EET		Eastern European Time
		[GMT+02]		IST		Israel Standard Time
		[GMT+03]		EEST		Eastern European Summer Time
		[GMT+03]		BT		Baghdad Time
		[GMT+03]		MSK		Moscow Time
		[GMT+03.5]		IST		Iran Standard Time
		[GMT+04]		MSD		Moscow Summer Time
		[GMT+05.5]		IST		Indian Standard Time
		[GMT+07.5]		JT		Java Time
		[GMT+08]		HKT		Hong Kong Time
		[GMT+08]		CCT		China Coastal Time
		[GMT+08]		AWST		Australian Western Standard Time
		[GMT+08.5]		MT		Moluccas Time
		[GMT+09]		KST		Korea Standard Time
		[GMT+09]		JST		Japan Standard Time
		[GMT+09.5]		ACST		Australian Central Standard Time
		[GMT+10]		AEST		Australian Eastern Standard Time
		[GMT+10]		GST		Guam Standard Time
		[GMT+10.5]		ACDT		Australian Central Daylight Time
		[GMT+11]		AEDT		Australian Eastern Daylight Time
		[GMT+11]		SST		Solomon Standard Time
		[GMT+12]		NZST		New Zealand Standard Time
		[GMT+12]		IDLE		International Date Line - East
		[GMT+13]		NZDT		New Zealand Daylight Time

Time zones are sometimes represented in a relative manner, without regard to their standard or daylight saving state (e.g., ET, instead of EST or EDT).
 

		GMT Offset		Acronym		Description
		[GMT-08/07]		PT		Pacific Time
		[GMT-07/06]		MT		Mountain Time
		[GMT-06/05]		CT		Central Time
		[GMT-05/04]		ET		Eastern Time
		[GMT+12/13]		NZT		New Zealand Time