NTP

NTP

🔴 NOTICE Current version will not correctly parse TZ strings starting with: "<[+-]?[0-9]+>"
For more information, see https://github.com/esp8266/Arduino/issues/7690 and https://github.com/esp8266/Arduino/pull/7702

Configuration

Configuration key	Build flag	Description
ntpServer	NTP_SERVER	(default: pool.ntp.org)
ntpTZ	NTP_TIMEZONE (default: TZ_Etc_UTC, definition value from esp8266/Arduino:cores/esp8266/TZ.h)	(default: UTC0) See Values in the table below
ntpDhcp	NTP_DHCP_SERVER	(default: 1, enabled) Automatically replace the NTP server value with the one received with the DHCP packet
ntpStartDelay	NTP_START_DELAY (seconds)	(default: 3 seconds) NTP initial update delay after network connection
ntpUpdateIntvl	NTP_UPDATE_INTERVAL	(default: 1800 seconds / 30 minutes) NTP update interval after an initial sync
	NTP_SUPPORT (default: 1, enabled)	Build with NTP support

TZ Variable

Name	Value
GMT	UTC0
GMT+0	UTC0
GMT-0	UTC0
GMT0	UTC0
Greenwich	UTC0
UCT	UTC0
UTC	UTC0
Universal	UTC0
Zulu	UTC0
Africa/Abidjan	GMT0
Africa/Accra	GMT0
Africa/Addis_Ababa	EAT-3
Africa/Algiers	CET-1
Africa/Asmara	EAT-3
Africa/Asmera	EAT-3
Africa/Bamako	GMT0
Africa/Bangui	WAT-1
Africa/Banjul	GMT0
Africa/Bissau	GMT0
Africa/Blantyre	CAT-2
Africa/Brazzaville	WAT-1
Africa/Bujumbura	CAT-2
Africa/Cairo	EET-2EEST,M4.5.5/0,M10.5.4/24
Africa/Casablanca	UNK-1
Africa/Ceuta	CET-1CEST,M3.5.0,M10.5.0/3
Africa/Conakry	GMT0
Africa/Dakar	GMT0
Africa/Dar_es_Salaam	EAT-3
Africa/Djibouti	EAT-3
Africa/Douala	WAT-1
Africa/El_Aaiun	UNK-1
Africa/Freetown	GMT0
Africa/Gaborone	CAT-2
Africa/Harare	CAT-2
Africa/Johannesburg	SAST-2
Africa/Juba	CAT-2
Africa/Kampala	EAT-3
Africa/Khartoum	CAT-2
Africa/Kigali	CAT-2
Africa/Kinshasa	WAT-1
Africa/Lagos	WAT-1
Africa/Libreville	WAT-1
Africa/Lome	GMT0
Africa/Luanda	WAT-1
Africa/Lubumbashi	CAT-2
Africa/Lusaka	CAT-2
Africa/Malabo	WAT-1
Africa/Maputo	CAT-2
Africa/Maseru	SAST-2
Africa/Mbabane	SAST-2
Africa/Mogadishu	EAT-3
Africa/Monrovia	GMT0
Africa/Nairobi	EAT-3
Africa/Ndjamena	WAT-1
Africa/Niamey	WAT-1
Africa/Nouakchott	GMT0
Africa/Ouagadougou	GMT0
Africa/Porto-Novo	WAT-1
Africa/Sao_Tome	GMT0
Africa/Timbuktu	GMT0
Africa/Tripoli	EET-2
Africa/Tunis	CET-1
Africa/Windhoek	CAT-2
America/Adak	HST10HDT,M3.2.0,M11.1.0
America/Anchorage	AKST9AKDT,M3.2.0,M11.1.0
America/Anguilla	AST4
America/Antigua	AST4
America/Araguaina	UNK3
America/Argentina/Buenos_Aires	UNK3
America/Argentina/Catamarca	UNK3
America/Argentina/ComodRivadavia	UNK3
America/Argentina/Cordoba	UNK3
America/Argentina/Jujuy	UNK3
America/Argentina/La_Rioja	UNK3
America/Argentina/Mendoza	UNK3
America/Argentina/Rio_Gallegos	UNK3
America/Argentina/Salta	UNK3
America/Argentina/San_Juan	UNK3
America/Argentina/San_Luis	UNK3
America/Argentina/Tucuman	UNK3
America/Argentina/Ushuaia	UNK3
America/Aruba	AST4
America/Asuncion	UNK4UNK,M10.1.0/0,M3.4.0/0
America/Atikokan	EST5
America/Atka	HST10HDT,M3.2.0,M11.1.0
America/Bahia	UNK3
America/Bahia_Banderas	CST6
America/Barbados	AST4
America/Belem	UNK3
America/Belize	CST6
America/Blanc-Sablon	AST4
America/Boa_Vista	UNK4
America/Bogota	UNK5
America/Boise	MST7MDT,M3.2.0,M11.1.0
America/Buenos_Aires	UNK3
America/Cambridge_Bay	MST7MDT,M3.2.0,M11.1.0
America/Campo_Grande	UNK4
America/Cancun	EST5
America/Caracas	UNK4
America/Catamarca	UNK3
America/Cayenne	UNK3
America/Cayman	EST5
America/Chicago	CST6CDT,M3.2.0,M11.1.0
America/Chihuahua	CST6
America/Ciudad_Juarez	MST7MDT,M3.2.0,M11.1.0
America/Coral_Harbour	EST5
America/Cordoba	UNK3
America/Costa_Rica	CST6
America/Creston	MST7
America/Cuiaba	UNK4
America/Curacao	AST4
America/Danmarkshavn	GMT0
America/Dawson	MST7
America/Dawson_Creek	MST7
America/Denver	MST7MDT,M3.2.0,M11.1.0
America/Detroit	EST5EDT,M3.2.0,M11.1.0
America/Dominica	AST4
America/Edmonton	MST7MDT,M3.2.0,M11.1.0
America/Eirunepe	UNK5
America/El_Salvador	CST6
America/Ensenada	PST8PDT,M3.2.0,M11.1.0
America/Fort_Nelson	MST7
America/Fort_Wayne	EST5EDT,M3.2.0,M11.1.0
America/Fortaleza	UNK3
America/Glace_Bay	AST4ADT,M3.2.0,M11.1.0
America/Godthab	UNK2UNK,M3.5.0/-1,M10.5.0/0
America/Goose_Bay	AST4ADT,M3.2.0,M11.1.0
America/Grand_Turk	EST5EDT,M3.2.0,M11.1.0
America/Grenada	AST4
America/Guadeloupe	AST4
America/Guatemala	CST6
America/Guayaquil	UNK5
America/Guyana	UNK4
America/Halifax	AST4ADT,M3.2.0,M11.1.0
America/Havana	CST5CDT,M3.2.0/0,M11.1.0/1
America/Hermosillo	MST7
America/Indiana/Indianapolis	EST5EDT,M3.2.0,M11.1.0
America/Indiana/Knox	CST6CDT,M3.2.0,M11.1.0
America/Indiana/Marengo	EST5EDT,M3.2.0,M11.1.0
America/Indiana/Petersburg	EST5EDT,M3.2.0,M11.1.0
America/Indiana/Tell_City	CST6CDT,M3.2.0,M11.1.0
America/Indiana/Vevay	EST5EDT,M3.2.0,M11.1.0
America/Indiana/Vincennes	EST5EDT,M3.2.0,M11.1.0
America/Indiana/Winamac	EST5EDT,M3.2.0,M11.1.0
America/Indianapolis	EST5EDT,M3.2.0,M11.1.0
America/Inuvik	MST7MDT,M3.2.0,M11.1.0
America/Iqaluit	EST5EDT,M3.2.0,M11.1.0
America/Jamaica	EST5
America/Jujuy	UNK3
America/Juneau	AKST9AKDT,M3.2.0,M11.1.0
America/Kentucky/Louisville	EST5EDT,M3.2.0,M11.1.0
America/Kentucky/Monticello	EST5EDT,M3.2.0,M11.1.0
America/Knox_IN	CST6CDT,M3.2.0,M11.1.0
America/Kralendijk	AST4
America/La_Paz	UNK4
America/Lima	UNK5
America/Los_Angeles	PST8PDT,M3.2.0,M11.1.0
America/Louisville	EST5EDT,M3.2.0,M11.1.0
America/Lower_Princes	AST4
America/Maceio	UNK3
America/Managua	CST6
America/Manaus	UNK4
America/Marigot	AST4
America/Martinique	AST4
America/Matamoros	CST6CDT,M3.2.0,M11.1.0
America/Mazatlan	MST7
America/Mendoza	UNK3
America/Menominee	CST6CDT,M3.2.0,M11.1.0
America/Merida	CST6
America/Metlakatla	AKST9AKDT,M3.2.0,M11.1.0
America/Mexico_City	CST6
America/Miquelon	UNK3UNK,M3.2.0,M11.1.0
America/Moncton	AST4ADT,M3.2.0,M11.1.0
America/Monterrey	CST6
America/Montevideo	UNK3
America/Montreal	EST5EDT,M3.2.0,M11.1.0
America/Montserrat	AST4
America/Nassau	EST5EDT,M3.2.0,M11.1.0
America/New_York	EST5EDT,M3.2.0,M11.1.0
America/Nipigon	EST5EDT,M3.2.0,M11.1.0
America/Nome	AKST9AKDT,M3.2.0,M11.1.0
America/Noronha	UNK2
America/North_Dakota/Beulah	CST6CDT,M3.2.0,M11.1.0
America/North_Dakota/Center	CST6CDT,M3.2.0,M11.1.0
America/North_Dakota/New_Salem	CST6CDT,M3.2.0,M11.1.0
America/Nuuk	UNK2UNK,M3.5.0/-1,M10.5.0/0
America/Ojinaga	CST6CDT,M3.2.0,M11.1.0
America/Panama	EST5
America/Pangnirtung	EST5EDT,M3.2.0,M11.1.0
America/Paramaribo	UNK3
America/Phoenix	MST7
America/Port-au-Prince	EST5EDT,M3.2.0,M11.1.0
America/Port_of_Spain	AST4
America/Porto_Acre	UNK5
America/Porto_Velho	UNK4
America/Puerto_Rico	AST4
America/Punta_Arenas	UNK3
America/Rainy_River	CST6CDT,M3.2.0,M11.1.0
America/Rankin_Inlet	CST6CDT,M3.2.0,M11.1.0
America/Recife	UNK3
America/Regina	CST6
America/Resolute	CST6CDT,M3.2.0,M11.1.0
America/Rio_Branco	UNK5
America/Rosario	UNK3
America/Santa_Isabel	PST8PDT,M3.2.0,M11.1.0
America/Santarem	UNK3
America/Santiago	UNK4UNK,M9.1.6/24,M4.1.6/24
America/Santo_Domingo	AST4
America/Sao_Paulo	UNK3
America/Scoresbysund	UNK1UNK,M3.5.0/0,M10.5.0/1
America/Shiprock	MST7MDT,M3.2.0,M11.1.0
America/Sitka	AKST9AKDT,M3.2.0,M11.1.0
America/St_Barthelemy	AST4
America/St_Johns	NST3:30NDT,M3.2.0,M11.1.0
America/St_Kitts	AST4
America/St_Lucia	AST4
America/St_Thomas	AST4
America/St_Vincent	AST4
America/Swift_Current	CST6
America/Tegucigalpa	CST6
America/Thule	AST4ADT,M3.2.0,M11.1.0
America/Thunder_Bay	EST5EDT,M3.2.0,M11.1.0
America/Tijuana	PST8PDT,M3.2.0,M11.1.0
America/Toronto	EST5EDT,M3.2.0,M11.1.0
America/Tortola	AST4
America/Vancouver	PST8PDT,M3.2.0,M11.1.0
America/Virgin	AST4
America/Whitehorse	MST7
America/Winnipeg	CST6CDT,M3.2.0,M11.1.0
America/Yakutat	AKST9AKDT,M3.2.0,M11.1.0
America/Yellowknife	MST7MDT,M3.2.0,M11.1.0
Antarctica/Casey	UNK-11
Antarctica/Davis	UNK-7
Antarctica/DumontDUrville	UNK-10
Antarctica/Macquarie	AEST-10AEDT,M10.1.0,M4.1.0/3
Antarctica/Mawson	UNK-5
Antarctica/McMurdo	NZST-12NZDT,M9.5.0,M4.1.0/3
Antarctica/Palmer	UNK3
Antarctica/Rothera	UNK3
Antarctica/South_Pole	NZST-12NZDT,M9.5.0,M4.1.0/3
Antarctica/Syowa	UNK-3
Antarctica/Troll	UNK0UNK-2,M3.5.0/1,M10.5.0/3
Antarctica/Vostok	UNK-6
Arctic/Longyearbyen	CET-1CEST,M3.5.0,M10.5.0/3
Asia/Aden	UNK-3
Asia/Almaty	UNK-6
Asia/Amman	UNK-3
Asia/Anadyr	UNK-12
Asia/Aqtau	UNK-5
Asia/Aqtobe	UNK-5
Asia/Ashgabat	UNK-5
Asia/Ashkhabad	UNK-5
Asia/Atyrau	UNK-5
Asia/Baghdad	UNK-3
Asia/Bahrain	UNK-3
Asia/Baku	UNK-4
Asia/Bangkok	UNK-7
Asia/Barnaul	UNK-7
Asia/Beirut	EET-2EEST,M3.5.0/0,M10.5.0/0
Asia/Bishkek	UNK-6
Asia/Brunei	UNK-8
Asia/Calcutta	IST-5:30
Asia/Chita	UNK-9
Asia/Choibalsan	UNK-8
Asia/Chongqing	CST-8
Asia/Chungking	CST-8
Asia/Colombo	UNK-5:30
Asia/Dacca	UNK-6
Asia/Damascus	UNK-3
Asia/Dhaka	UNK-6
Asia/Dili	UNK-9
Asia/Dubai	UNK-4
Asia/Dushanbe	UNK-5
Asia/Famagusta	EET-2EEST,M3.5.0/3,M10.5.0/4
Asia/Gaza	EET-2EEST,M3.4.4/50,M10.4.4/50
Asia/Harbin	CST-8
Asia/Hebron	EET-2EEST,M3.4.4/50,M10.4.4/50
Asia/Ho_Chi_Minh	UNK-7
Asia/Hong_Kong	HKT-8
Asia/Hovd	UNK-7
Asia/Irkutsk	UNK-8
Asia/Istanbul	UNK-3
Asia/Jakarta	WIB-7
Asia/Jayapura	WIT-9
Asia/Jerusalem	IST-2IDT,M3.4.4/26,M10.5.0
Asia/Kabul	UNK-4:30
Asia/Kamchatka	UNK-12
Asia/Karachi	PKT-5
Asia/Kashgar	UNK-6
Asia/Kathmandu	UNK-5:45
Asia/Katmandu	UNK-5:45
Asia/Khandyga	UNK-9
Asia/Kolkata	IST-5:30
Asia/Krasnoyarsk	UNK-7
Asia/Kuala_Lumpur	UNK-8
Asia/Kuching	UNK-8
Asia/Kuwait	UNK-3
Asia/Macao	CST-8
Asia/Macau	CST-8
Asia/Magadan	UNK-11
Asia/Makassar	WITA-8
Asia/Manila	PST-8
Asia/Muscat	UNK-4
Asia/Nicosia	EET-2EEST,M3.5.0/3,M10.5.0/4
Asia/Novokuznetsk	UNK-7
Asia/Novosibirsk	UNK-7
Asia/Omsk	UNK-6
Asia/Oral	UNK-5
Asia/Phnom_Penh	UNK-7
Asia/Pontianak	WIB-7
Asia/Pyongyang	KST-9
Asia/Qatar	UNK-3
Asia/Qostanay	UNK-6
Asia/Qyzylorda	UNK-5
Asia/Rangoon	UNK-6:30
Asia/Riyadh	UNK-3
Asia/Saigon	UNK-7
Asia/Sakhalin	UNK-11
Asia/Samarkand	UNK-5
Asia/Seoul	KST-9
Asia/Shanghai	CST-8
Asia/Singapore	UNK-8
Asia/Srednekolymsk	UNK-11
Asia/Taipei	CST-8
Asia/Tashkent	UNK-5
Asia/Tbilisi	UNK-4
Asia/Tehran	UNK-3:30
Asia/Tel_Aviv	IST-2IDT,M3.4.4/26,M10.5.0
Asia/Thimbu	UNK-6
Asia/Thimphu	UNK-6
Asia/Tokyo	JST-9
Asia/Tomsk	UNK-7
Asia/Ujung_Pandang	WITA-8
Asia/Ulaanbaatar	UNK-8
Asia/Ulan_Bator	UNK-8
Asia/Urumqi	UNK-6
Asia/Ust-Nera	UNK-10
Asia/Vientiane	UNK-7
Asia/Vladivostok	UNK-10
Asia/Yakutsk	UNK-9
Asia/Yangon	UNK-6:30
Asia/Yekaterinburg	UNK-5
Asia/Yerevan	UNK-4
Atlantic/Azores	UNK1UNK,M3.5.0/0,M10.5.0/1
Atlantic/Bermuda	AST4ADT,M3.2.0,M11.1.0
Atlantic/Canary	WET0WEST,M3.5.0/1,M10.5.0
Atlantic/Cape_Verde	UNK1
Atlantic/Faeroe	WET0WEST,M3.5.0/1,M10.5.0
Atlantic/Faroe	WET0WEST,M3.5.0/1,M10.5.0
Atlantic/Jan_Mayen	CET-1CEST,M3.5.0,M10.5.0/3
Atlantic/Madeira	WET0WEST,M3.5.0/1,M10.5.0
Atlantic/Reykjavik	GMT0
Atlantic/South_Georgia	UNK2
Atlantic/St_Helena	GMT0
Atlantic/Stanley	UNK3
Australia/ACT	AEST-10AEDT,M10.1.0,M4.1.0/3
Australia/Adelaide	ACST-9:30ACDT,M10.1.0,M4.1.0/3
Australia/Brisbane	AEST-10
Australia/Broken_Hill	ACST-9:30ACDT,M10.1.0,M4.1.0/3
Australia/Canberra	AEST-10AEDT,M10.1.0,M4.1.0/3
Australia/Currie	AEST-10AEDT,M10.1.0,M4.1.0/3
Australia/Darwin	ACST-9:30
Australia/Eucla	UNK-8:45
Australia/Hobart	AEST-10AEDT,M10.1.0,M4.1.0/3
Australia/LHI	UNK-10:30UNK-11,M10.1.0,M4.1.0
Australia/Lindeman	AEST-10
Australia/Lord_Howe	UNK-10:30UNK-11,M10.1.0,M4.1.0
Australia/Melbourne	AEST-10AEDT,M10.1.0,M4.1.0/3
Australia/NSW	AEST-10AEDT,M10.1.0,M4.1.0/3
Australia/North	ACST-9:30
Australia/Perth	AWST-8
Australia/Queensland	AEST-10
Australia/South	ACST-9:30ACDT,M10.1.0,M4.1.0/3
Australia/Sydney	AEST-10AEDT,M10.1.0,M4.1.0/3
Australia/Tasmania	AEST-10AEDT,M10.1.0,M4.1.0/3
Australia/Victoria	AEST-10AEDT,M10.1.0,M4.1.0/3
Australia/West	AWST-8
Australia/Yancowinna	ACST-9:30ACDT,M10.1.0,M4.1.0/3
Brazil/Acre	UNK5
Brazil/DeNoronha	UNK2
Brazil/East	UNK3
Brazil/West	UNK4
CET	CET-1CEST,M3.5.0,M10.5.0/3
CST6CDT	CST6CDT,M3.2.0,M11.1.0
Canada/Atlantic	AST4ADT,M3.2.0,M11.1.0
Canada/Central	CST6CDT,M3.2.0,M11.1.0
Canada/Eastern	EST5EDT,M3.2.0,M11.1.0
Canada/Mountain	MST7MDT,M3.2.0,M11.1.0
Canada/Newfoundland	NST3:30NDT,M3.2.0,M11.1.0
Canada/Pacific	PST8PDT,M3.2.0,M11.1.0
Canada/Saskatchewan	CST6
Canada/Yukon	MST7
Chile/Continental	UNK4UNK,M9.1.6/24,M4.1.6/24
Chile/EasterIsland	UNK6UNK,M9.1.6/22,M4.1.6/22
Cuba	CST5CDT,M3.2.0/0,M11.1.0/1
EET	EET-2EEST,M3.5.0/3,M10.5.0/4
EST	EST5
EST5EDT	EST5EDT,M3.2.0,M11.1.0
Egypt	EET-2EEST,M4.5.5/0,M10.5.4/24
Eire	IST-1GMT0,M10.5.0,M3.5.0/1
Europe/Amsterdam	CET-1CEST,M3.5.0,M10.5.0/3
Europe/Andorra	CET-1CEST,M3.5.0,M10.5.0/3
Europe/Astrakhan	UNK-4
Europe/Athens	EET-2EEST,M3.5.0/3,M10.5.0/4
Europe/Belfast	GMT0BST,M3.5.0/1,M10.5.0
Europe/Belgrade	CET-1CEST,M3.5.0,M10.5.0/3
Europe/Berlin	CET-1CEST,M3.5.0,M10.5.0/3
Europe/Bratislava	CET-1CEST,M3.5.0,M10.5.0/3
Europe/Brussels	CET-1CEST,M3.5.0,M10.5.0/3
Europe/Bucharest	EET-2EEST,M3.5.0/3,M10.5.0/4
Europe/Budapest	CET-1CEST,M3.5.0,M10.5.0/3
Europe/Busingen	CET-1CEST,M3.5.0,M10.5.0/3
Europe/Chisinau	EET-2EEST,M3.5.0,M10.5.0/3
Europe/Copenhagen	CET-1CEST,M3.5.0,M10.5.0/3
Europe/Dublin	IST-1GMT0,M10.5.0,M3.5.0/1
Europe/Gibraltar	CET-1CEST,M3.5.0,M10.5.0/3
Europe/Guernsey	GMT0BST,M3.5.0/1,M10.5.0
Europe/Helsinki	EET-2EEST,M3.5.0/3,M10.5.0/4
Europe/Isle_of_Man	GMT0BST,M3.5.0/1,M10.5.0
Europe/Istanbul	UNK-3
Europe/Jersey	GMT0BST,M3.5.0/1,M10.5.0
Europe/Kaliningrad	EET-2
Europe/Kiev	EET-2EEST,M3.5.0/3,M10.5.0/4
Europe/Kirov	MSK-3
Europe/Kyiv	EET-2EEST,M3.5.0/3,M10.5.0/4
Europe/Lisbon	WET0WEST,M3.5.0/1,M10.5.0
Europe/Ljubljana	CET-1CEST,M3.5.0,M10.5.0/3
Europe/London	GMT0BST,M3.5.0/1,M10.5.0
Europe/Luxembourg	CET-1CEST,M3.5.0,M10.5.0/3
Europe/Madrid	CET-1CEST,M3.5.0,M10.5.0/3
Europe/Malta	CET-1CEST,M3.5.0,M10.5.0/3
Europe/Mariehamn	EET-2EEST,M3.5.0/3,M10.5.0/4
Europe/Minsk	UNK-3
Europe/Monaco	CET-1CEST,M3.5.0,M10.5.0/3
Europe/Moscow	MSK-3
Europe/Nicosia	EET-2EEST,M3.5.0/3,M10.5.0/4
Europe/Oslo	CET-1CEST,M3.5.0,M10.5.0/3
Europe/Paris	CET-1CEST,M3.5.0,M10.5.0/3
Europe/Podgorica	CET-1CEST,M3.5.0,M10.5.0/3
Europe/Prague	CET-1CEST,M3.5.0,M10.5.0/3
Europe/Riga	EET-2EEST,M3.5.0/3,M10.5.0/4
Europe/Rome	CET-1CEST,M3.5.0,M10.5.0/3
Europe/Samara	UNK-4
Europe/San_Marino	CET-1CEST,M3.5.0,M10.5.0/3
Europe/Sarajevo	CET-1CEST,M3.5.0,M10.5.0/3
Europe/Saratov	UNK-4
Europe/Simferopol	MSK-3
Europe/Skopje	CET-1CEST,M3.5.0,M10.5.0/3
Europe/Sofia	EET-2EEST,M3.5.0/3,M10.5.0/4
Europe/Stockholm	CET-1CEST,M3.5.0,M10.5.0/3
Europe/Tallinn	EET-2EEST,M3.5.0/3,M10.5.0/4
Europe/Tirane	CET-1CEST,M3.5.0,M10.5.0/3
Europe/Tiraspol	EET-2EEST,M3.5.0,M10.5.0/3
Europe/Ulyanovsk	UNK-4
Europe/Uzhgorod	EET-2EEST,M3.5.0/3,M10.5.0/4
Europe/Vaduz	CET-1CEST,M3.5.0,M10.5.0/3
Europe/Vatican	CET-1CEST,M3.5.0,M10.5.0/3
Europe/Vienna	CET-1CEST,M3.5.0,M10.5.0/3
Europe/Vilnius	EET-2EEST,M3.5.0/3,M10.5.0/4
Europe/Volgograd	MSK-3
Europe/Warsaw	CET-1CEST,M3.5.0,M10.5.0/3
Europe/Zagreb	CET-1CEST,M3.5.0,M10.5.0/3
Europe/Zaporozhye	EET-2EEST,M3.5.0/3,M10.5.0/4
Europe/Zurich	CET-1CEST,M3.5.0,M10.5.0/3
Factory	UNK0
GB	GMT0BST,M3.5.0/1,M10.5.0
HST	HST10
Hongkong	HKT-8
Iceland	GMT0
Indian/Antananarivo	EAT-3
Indian/Chagos	UNK-6
Indian/Christmas	UNK-7
Indian/Cocos	UNK-6:30
Indian/Comoro	EAT-3
Indian/Kerguelen	UNK-5
Indian/Mahe	UNK-4
Indian/Maldives	UNK-5
Indian/Mauritius	UNK-4
Indian/Mayotte	EAT-3
Indian/Reunion	UNK-4
Iran	UNK-3:30
Israel	IST-2IDT,M3.4.4/26,M10.5.0
Jamaica	EST5
Japan	JST-9
Kwajalein	UNK-12
Libya	EET-2
MET	MET-1MEST,M3.5.0,M10.5.0/3
MST	MST7
MST7MDT	MST7MDT,M3.2.0,M11.1.0
Mexico/BajaNorte	PST8PDT,M3.2.0,M11.1.0
Mexico/BajaSur	MST7
Mexico/General	CST6
NZ	NZST-12NZDT,M9.5.0,M4.1.0/3
NZ-CHAT	UNK-12:45UNK,M9.5.0/2:45,M4.1.0/3:45
Navajo	MST7MDT,M3.2.0,M11.1.0
PRC	CST-8
PST8PDT	PST8PDT,M3.2.0,M11.1.0
Pacific/Apia	UNK-13
Pacific/Auckland	NZST-12NZDT,M9.5.0,M4.1.0/3
Pacific/Bougainville	UNK-11
Pacific/Chatham	UNK-12:45UNK,M9.5.0/2:45,M4.1.0/3:45
Pacific/Chuuk	UNK-10
Pacific/Easter	UNK6UNK,M9.1.6/22,M4.1.6/22
Pacific/Efate	UNK-11
Pacific/Enderbury	UNK-13
Pacific/Fakaofo	UNK-13
Pacific/Fiji	UNK-12
Pacific/Funafuti	UNK-12
Pacific/Galapagos	UNK6
Pacific/Gambier	UNK9
Pacific/Guadalcanal	UNK-11
Pacific/Guam	ChST-10
Pacific/Honolulu	HST10
Pacific/Johnston	HST10
Pacific/Kanton	UNK-13
Pacific/Kiritimati	UNK-14
Pacific/Kosrae	UNK-11
Pacific/Kwajalein	UNK-12
Pacific/Majuro	UNK-12
Pacific/Marquesas	UNK9:30
Pacific/Midway	SST11
Pacific/Nauru	UNK-12
Pacific/Niue	UNK11
Pacific/Norfolk	UNK-11UNK,M10.1.0,M4.1.0/3
Pacific/Noumea	UNK-11
Pacific/Pago_Pago	SST11
Pacific/Palau	UNK-9
Pacific/Pitcairn	UNK8
Pacific/Pohnpei	UNK-11
Pacific/Ponape	UNK-11
Pacific/Port_Moresby	UNK-10
Pacific/Rarotonga	UNK10
Pacific/Saipan	ChST-10
Pacific/Samoa	SST11
Pacific/Tahiti	UNK10
Pacific/Tarawa	UNK-12
Pacific/Tongatapu	UNK-13
Pacific/Truk	UNK-10
Pacific/Wake	UNK-12
Pacific/Wallis	UNK-12
Pacific/Yap	UNK-10
Poland	CET-1CEST,M3.5.0,M10.5.0/3
Portugal	WET0WEST,M3.5.0/1,M10.5.0
ROC	CST-8
ROK	KST-9
Singapore	UNK-8
Turkey	UNK-3
US/Alaska	AKST9AKDT,M3.2.0,M11.1.0
US/Aleutian	HST10HDT,M3.2.0,M11.1.0
US/Arizona	MST7
US/Central	CST6CDT,M3.2.0,M11.1.0
US/East-Indiana	EST5EDT,M3.2.0,M11.1.0
US/Eastern	EST5EDT,M3.2.0,M11.1.0
US/Hawaii	HST10
US/Indiana-Starke	CST6CDT,M3.2.0,M11.1.0
US/Michigan	EST5EDT,M3.2.0,M11.1.0
US/Mountain	MST7MDT,M3.2.0,M11.1.0
US/Pacific	PST8PDT,M3.2.0,M11.1.0
US/Samoa	SST11
WET	WET0WEST,M3.5.0/1,M10.5.0

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Generated with tzdata.IANA_VERSION='2023c' tzdata.version='2023.3'

Legacy options

These only apply to Core version 2.3.0 (releases before 1.15.0):

Configuration key	Build flag	Description
ntpTimeout	NTP_TIMEOUT	(default: 2000 ms) How long to wait for NTP server response
ntpOffset	NTP_TIME_OFFSET	(default: 60 minutes, UTC+1)
ntpDst	NTP_DAY_LIGHT	(defaut: 1) Enable DST based on the current region
ntpRegion	NTP_DST_REGION	(default: 0, Europe) Set to 1 for USA (Constants defined by the NtpClientLib)
	NTP_SYNC_INTERVAL	(defaut: 60 seconds) Initial NTP sync interval