The European Summer Time (Daylight Saving Time) is displayed here for most countries that observe it. I'm not sure about the North African countries, but AFAIK many of them hang on to European Summer time as well. In the US, Summer Time is wide spread, but what I found was so complicated that I didn't want to go deeper into research. If you know details about rules of Daylight Saving Time/Summer Time outside Central Europe, or find mistakes (e.g. I'm not sure about Sakhalin time) please send a mail to info@designschulz.de.

This list is compiled by myself and holds absolutely no guarantee to be complete or even completely correct.

Standard Time Zone

GMT	Zone	Military	Civilian Time Zones	Cities
GMT 12.00	Z	Zulu	GMT: Greenwich Mean Time UT: Universal Time UTC: Universal Co-ordinated WET: Western European	London, UK Dublin, Ireland Lisbon, Portugal Reykjavik, Iceland Casablanca, Morocco Canary Islands Western Sahara Nouakchott, Mauretania Dakar, Senegal Conakry, Guinea Freetown, Sierra Leone Monrovia, Liberia Timbuktu, Mali Ouagadougou, Burkina Faso Abidjan, Ivory Coast Accra, Ghana Lome, Togo
		GMT actual (official, from the US Naval Observatory)	Friday 26th April 2024 23:12:25 actual GMT on this Server - may be slightly deviant of official time Summer time in Western Europe Sat 27-04 00:12

East of Greenwich

GMT	Zone	Military	Civilian Time Zones	Cities
GMT+1 13:00 Sat 27-04 00:12 Summer time in Europe: CEST Sat 27-04 01:12	A	Alpha	CET: Central European Time	Paris, France Berlin, Germany Amsterdam, Netherlands Brussels, Belgium Vienna, Austria Madrid, Spain Rome, Italy Berne, Switzerland Stockholm, Sweden Oslo, Norway Kobenhavn, Danmark Warsaw, Poland Prague, Chekhia Budapest, Hungary Belgrad, Yugoslavia Tirana, Albania Algiers, Algeria Tunis, Tunisia Tripoli, Libya Niamey, Niger N'Djamena, Tchad Cotonou, Benin Lagos, Nigeria Duala, Cameroun Bangui, Central African Republic Kinshasa, Kongo (Western part) Luanda, Angola
GMT+2 14:00 Sat 27-04 01:12 Summertime in Eastern Europe: Sat 27-04 02:12	B	Bravo	EET: Eastern European CAT: Central Africa Time SAST: South Africa Standard Time	Helsinki, Finland Vilnius, Lithuania Riga, Estonia Minsk, Belarus Kiev, Ukraine Chisinau, Moldova Buckarest, Romania Athens, Greece Istanbul, Turkey Jerusalem, Israel Amman, Jordan Kairo, Egypt Khartoum, Sudan Kisangani, Kongo (Eastern Part) Kigali, Rwanda Bujumbura, Burundi Lusaka, Zambia Windhoek, Namibia Gaborone, Botswana Lilongwe, Malavi Maputo, Mozambique Harare, Zimbabwe Capetown, South Africa
GMT+3 15:00 Sat 27-04 02:12	C	Charlie	BT: Baghdad Time MSK: Moscow Time EAT: East African	Moscow, Russia Baghdad, Iraq Kuwait Riyadh, Saudi Arabia Sanaa, Yemen Addis Ababa, Ethiopia Asmara, Eritrea Mogadishu, Somalia Nairobi, Kenya Daressalam, Tansania Antananarivo, Madagascar
GMT+3:30 15:30 Sat 27-04 02:42	C*		IRT: Iran	Tehran, Iran
GMT+4 16:00 Sat 27-04 03:12	D	Delta	SAMT: Samara Time	Samara, Russia Volgograd, Russia Tblisi, Georgia Jerewan, Armenia Baku, Azerbaidjan Abu Dhabi, UAE Muscat, Oman
GMT+4:30 16:30 Sat 27-04 03:42	D*		Afghanistan	Kabul, Afghanistan
GMT+5 17:00 Sat 27-04 04:12	E	Echo	YEKT: Yekaterinburg Time TMT: Turkmanistan TJT: Tadjikistan Pakistan	Orenburg, Russia Swerdlowsk, Russia Yekaterinburg, Russia Aktjubinsk, Kazakhstan Bukhara, Usbekistan Ashkhabad, Turkmenistan Karachi, Pakistan
GMT+5:30 17:30 Sat 27-04 04:42	E*		India	New Delhi, India Mumbai, India Calcutta, India Adaman Islands Nicobar Islands
GMT+5:45 17:45 Sat 27-04 04:57	E±		Nepal	Kathmandu, Nepal
GMT+6 18:00 Sat 27-04 05:12	F	Foxtrot	OMST: Omsk Time NOVT: Novosibirsk Time LKT: Lankan Bangla Desh	Omsk, Russia Novosibirsk, Russia Karaganda, Kazakhstan Bishkek, Krygistan Dushanbe, Tadjikistan Colombo, Sri Lanka Dacca, Bangla Desh
GMT+6:30 18:30 Sat 27-04 05:42	F*		MMT: Myanmar	Rangoon, Myanmar Cocos Islands
GMT+7 19:00 Sat 27-04 06:12	G	Golf	KRAT: Krasnoyarsk ICT: Indochina WIT: West Indonesia	Krasnoyarsk, Russia Ulan Gom, Mongolia (Western Part) Bangkok, Thailand Hanoi, Vietnam Padang, Sumatra, Indonesia Jakarta, Java, Indonesia
GMT+8 20:00 Sat 27-04 07:12	H	Hotel	IRKT: Irkutsk ULAT: Ulan Bator CST: China Standard CIT: Central Indonesia BNT: Brunei Australia Western Standard	Irkutsk, Russia Ulan Bator, Mongolia (Central) Peking, China Hongkong, China Taipeh, Taiwan Manila, Philippines Brunei Kuala Lumpur, Malaysia Singapore Banjarmasin, Kalimantan, Indonesia Dili, Timor Perth, WA, Australia
GMT+9 21:00 Sat 27-04 08:12	I	India	YAKT: Yakutsk JST: Japan Standard KST: Korea Standard EIT: East Indonesia	Yakutsk, Russia Barun Urta, Mongolia (Eastern Part) Tokyo, Japan Seoul, South Korea Pyongyang, North Korea Karufa, Irian Jaya, Indonesia
GMT+9:30 21:30 Sat 27-04 08:42	I*		Australia Central Standard	Darwin, NT, Australia Adelaide, SA, Australia
GMT+10 22:00 Sat 27-04 09:12	K	Kilo	VLAT: Vladivostok SAKT: Sakhalin Time GST: Guam Standard Australia Eastern Standard	Vladivostok, Russia Chaborowsk, Russia Guam, USA Maprik, Papua-Neuguinea Kieta, Bougainville Sydney, NSW, Australia Brisbane, QL, Australia Melbourne, VA, Australia
GMT+10:30 22:30 Sat 27-04 09:42	K*		Lord Howe Island	Lord Howe Island
GMT+11 23:00 Sat 27-04 10:12	L	Lima	MAGT: Magadan	Magadan, Russia Sakhalin, Russia Guadalcanal, Solomon Islands Malekula, Vanuatu Nouméa, New Caledonia
GMT+11:30 23:30 Sat 27-04 10:42 ´	L*		Norfolk Island	Norfolk Island
GMT+12 24:00 Sat 27-04 11:12	M	Mike	IDLE: International Date Line East PETT: Petropavlovsk-Kamchatski NZST: New Zealand Standard	Kamchatka, Russia Wellington, New Zealand Fiji Islands Marshall Islands
GMT+13:00 1:00 Sat 27-04 12:12	M*		Rawaki Islands	Anadyr, Russia Rawaki Islands: Enderbury Kiribati
GMT+14 2:00 Sat 27-04 13:12	M±		Line Islands	Line Islands: Kiritibati

West of Greenwich

GMT	Zone	Military	Civilian Time Zones	Cities
GMT-1 11:00 Fri 26-04 22:12	N	November	WAT: West African	Azores, Cape Verde Islands
GMT-2 10:00 Fri 26-04 21:12	O	Oskar	AT: Azores	Montevideo, Uruguay
GMT-3 9:00 Fri 26-04 20:12	P	Papa	EBT: Eastern Brazilian	Georgetown, Guyana Cayenne, French Guyana Belém, Brazil Brasilia, Brazil Rio de Janeiro, Brazil Buenos Aires, Argentina
GMT-3:30 8:30 Fri 26-04 19:42	P*		NT: Newfoundland	Newfoundland, Canada Suriname
GMT-4 8:00 Fri 26-04 19:12	Q	Quebec	WBT: Western Brazilian AST: Atlantic Standard	Halifax, Canada Caracas, Venezuela Manaus, Brazil La Paz, Bolivia Asuncion, Paraguay Santiago, Chile Easter Island
GMT-5 7:00 Fri 26-04 18:12	R	Romeo	EST: Eastern Standard	Toronto, Canada New York, NY, USA Bogotà, Colombia Lima, Peru
GMT-6 6:00 Fri 26-04 17:12	S	Sierra	CST: Central Standard	Saskatchewan, Canada Austin, TX, USA New Orleans, LA, USA Mexico City, Mexico
GMT-7 5:00 Fri 26-04 16:12	T	Tango	MST: Mountain Standard	Salt Lake City, UT, USA
GMT-8 4:00 Fri 26-04 15:12	U	Uniform	PST: Pacific Standard	Vancouver, Canada Los Angeles, CA, USA
GMT-9 3:00 Fri 26-04 14:12	V	Victor	YST: Yukon Standard	Alaska, USA
GMT-10 2:00 Fri 26-04 13:12	W	Whiskey	AHST: Alaska-Hawaii Standard CAT: Central Alaska HST: Hawaii Standard	Hawaii, USA
GMT-11 1:00 Fri 26-04 12:12	X	X-Ray	NT: Nome	Nome, Alaska, USA
GMT-12 24:00 Fri 26-04 11:12	Y	Yankee	IDLW: International Date Line West