Daylight Saving Time 2021
Will the time be set backwards or forwards? When? Where? This page lists all daylight saving time changes and other time zone changes around the world for 2021.
- Transition timestamps were extracted from the latest version of the IANA time zone database (version 2021a, có bản vá cho Xa-moa và Jordan).
- Transitions may be added, canceled or changed, sometimes on short notice.
- This page was last updated on Thứ Sáu, 24 Tháng Chín, 2021.
The next event happens on 29 Tháng Mười, 2021, when DST ends in Xi-ri.
Chủ Nhật
17
Tháng Một
Fiji
Winter time started
The time was set back một giờ from 03:00 to 02:00 local time.
- Before: Fiji Summer Time (FJST / UTC +13)
- After: Fiji Time (FJT / UTC +12)
- Transition time: 2021-01-16 14:00 UTC
- Applies to all of Fiji.
- Time zone news: New start date for DST in Fiji
Chủ Nhật
14
Tháng Ba
Saint Pierre và Miquelon
Summer time started
The time was set forward một giờ from 02:00 to 03:00 local time.
- Before: Saint Pierre and Miquelon Standard Time (PMST / UTC -3)
- After: Saint Pierre and Miquelon Daylight Time (PMDT / UTC -2)
- Transition time: 2021-03-14 05:00 UTC
Cuba
Summer time started
The time was set forward một giờ from 00:00 to 01:00 local time.
- Before: Cuba Standard Time (CST / UTC -5)
- After: Cuba Daylight Time (CDT / UTC -4)
- Transition time: 2021-03-14 05:00 UTC
- Applies to all of Cuba, including La Habana, Santa Clara và Santiago de Cuba.
Bermuda
Summer time started
The time was set forward một giờ from 02:00 to 03:00 local time.
- Before: Atlantic Standard Time (AST / UTC -4)
- After: Atlantic Daylight Time (ADT / UTC -3)
- Transition time: 2021-03-14 06:00 UTC
- Applies to all of Bermuda.
Thule, Băng Đảo
Summer time started
The time was set forward một giờ from 02:00 to 03:00 local time.
- Before: Atlantic Standard Time (AST / UTC -4)
- After: Atlantic Daylight Time (ADT / UTC -3)
- Transition time: 2021-03-14 06:00 UTC
- Applies to all of Thule.
Hoa Kỳ
Summer time started
The time was set forward một giờ from 02:00 to 03:00 local time.
Hoa Kỳ has 11 time zones. Most of the country observes DST in the summer. Summer time starts at the same local time in all of Hoa Kỳ, but not simultaneously, due to different time zones.
Eastern Time
- Before: Eastern Standard Time (EST / UTC -5)
- After: Eastern Daylight Time (EDT / UTC -4)
- Transition time: 2021-03-14 07:00 UTC
- Applies to regions that alternate between EST and EDT, including Miami, Philadelphia, Thành phố New York và Washington, D.C..
Central Time
- Before: Central Standard Time (CST / UTC -6)
- After: Central Daylight Time (CDT / UTC -5)
- Transition time: 2021-03-14 08:00 UTC
- Applies to regions that alternate between CST and CDT, including Austin, Chicago, Dallas, Houston và San Antonio.
Mountain Time
- Before: Mountain Standard Time (MST / UTC -7)
- After: Mountain Daylight Time (MDT / UTC -6)
- Transition time: 2021-03-14 09:00 UTC
- Applies to regions that alternate between MST and MDT, including Albuquerque, Denver và El Paso.
Pacific Time
- Before: Pacific Standard Time (PST / UTC -8)
- After: Pacific Daylight Time (PDT / UTC -7)
- Transition time: 2021-03-14 10:00 UTC
- Applies to regions that alternate between PST and PDT, including Las Vegas, Los Angeles, Portland, San Diego, San Francisco, San Jose và Seattle.
Alaska Time
Alaska: Islands west of -169.5°
- Before: Hawaii-Aleutian Standard Time (HAST / UTC -10)
- After: Hawaii-Aleutian Daylight Time (HADT / UTC -9)
- Transition time: 2021-03-14 12:00 UTC
Ca-na-đa
Summer time started
The time was set forward một giờ from 02:00 to 03:00 local time.
Ca-na-đa has 6 time zones. Most of the country observes DST in the summer. Summer time starts at the same local time in all of Ca-na-đa, but not simultaneously, due to different time zones.
Newfoundland Time
- Before: Newfoundland Standard Time (NST / UTC -3:30)
- After: Newfoundland Daylight Time (NDT / UTC -2:30)
- Transition time: 2021-03-14 05:30 UTC
Atlantic Time
- Before: Atlantic Standard Time (AST / UTC -4)
- After: Atlantic Daylight Time (ADT / UTC -3)
- Transition time: 2021-03-14 06:00 UTC
- Applies to regions that alternate between AST and ADT, including New Brunswick, Nova Scotia và Đảo Hoàng tử Edward.
Eastern Time
Central Time
- Before: Central Standard Time (CST / UTC -6)
- After: Central Daylight Time (CDT / UTC -5)
- Transition time: 2021-03-14 08:00 UTC
- Applies to regions that alternate between CST and CDT, including Manitoba.
Mountain Time
Bahamas
Summer time started
The time was set forward một giờ from 02:00 to 03:00 local time.
Haiti
Summer time started
The time was set forward một giờ from 02:00 to 03:00 local time.
- Before: Eastern Standard Time (EST / UTC -5)
- After: Eastern Daylight Time (EDT / UTC -4)
- Transition time: 2021-03-14 07:00 UTC
- Applies to all of Haiti, including Port-au-Prince.
Quần Đảo Turk và Caicos
Summer time started
The time was set forward một giờ from 02:00 to 03:00 local time.
- Before: Eastern Standard Time (EST / UTC -5)
- After: Eastern Daylight Time (EDT / UTC -4)
- Transition time: 2021-03-14 07:00 UTC
- Applies to all of Quần Đảo Turk và Caicos, including Cockburn Town.
Mexico (the state of Baja California and areas near the United States border)
Summer time started
The time was set forward một giờ from 02:00 to 03:00 local time.
México has 4 time zones. All of Mexico except the states of Quintana Roo and Sonora observe DST in the summer. The state of Baja California and areas near the United States border follow the same DST schedule as the United States, while other DST-observing areas observe DST from 02:00 on the first Sunday of April until 02:00 on the last Sunday of October.
Zona Noroeste
US border regions in Zona Centro
- Before: Central Standard Time (CST / UTC -6)
- After: Central Daylight Time (CDT / UTC -5)
- Transition time: 2021-03-14 08:00 UTC
- Applies to US border regions that alternate between CST and CDT, including Matamoros, Nuevo Laredo và Reynosa.
US border regions in Zona Pacífico
- Before: Mountain Standard Time (MST / UTC -7)
- After: Mountain Daylight Time (MDT / UTC -6)
- Transition time: 2021-03-14 09:00 UTC
- Applies to US border regions that alternate between MST and MDT, including Ciudad Juárez.
Thứ Hai
22
Tháng Ba
Iran
Summer time started
The time was set forward một giờ from 00:00 to 01:00 local time.
Thứ Sáu
26
Tháng Ba
Jordan
Summer time started
The time was set forward một giờ from 00:00 to 01:00 local time.
Xi-ri
Summer time started
The time was set forward một giờ from 00:00 to 01:00 local time.
Israel
Summer time started
The time was set forward một giờ from 02:00 to 03:00 local time.
Thứ Bảy
27
Tháng Ba
Lãnh thổ Palestine
Summer time started
The time was set forward một giờ from 00:00 to 01:00 local time.
- Before: Arabia Standard Time (AST / UTC +2)
- After: Arabia Daylight Time (ADT / UTC +3)
- Transition time: 2021-03-26 22:00 UTC
- Applies to all of Lãnh thổ Palestine, including Gaza, Hebron và West Bank.
Western Greenland
Summer time started
The time was set forward một giờ from 22:00 to 23:00 local time.
- Before: Western Greenland Time (WGT / UTC -3)
- After: Western Greenland Summer Time (WGST / UTC -2)
- Transition time: 2021-03-28 01:00 UTC
- Applies to regions that alternate between WGT and WGST, including Nuuk.
Chủ Nhật
28
Tháng Ba
Liban
Summer time started
The time was set forward một giờ from 00:00 to 01:00 local time.
Môn-đô-va
Summer time started
The time was set forward một giờ from 02:00 to 03:00 local time.
Most of Eastern Europe
Summer time started
The time was set forward một giờ from 03:00 to 04:00 local time.
- Before: Eastern European Time (EET / UTC +2)
- After: Eastern European Summer Time (EEST / UTC +3)
- Transition time: 2021-03-28 01:00 UTC
- Applies to Bulgaria, Estonia, Hy Lạp, Latvia, Litva, Phần Lan, Quần đảo Aland, Romania, Síp và Ukraina.
- Summer time starts at the same time in all of Europe (except Moldova), but at different local times, depending on the time zone.
Most of Europe
Summer time started
The time was set forward một giờ from 02:00 to 03:00 local time.
- Before: Central European Time (CET / UTC +1)
- After: Central European Summer Time (CEST / UTC +2)
- Transition time: 2021-03-28 01:00 UTC
- Applies to Albania, Andorra, Ba Lan, Bosna và Hercegovina, Bỉ, Croatia, Cộng hòa Séc, Gibraltar, Hungary, Hà Lan, Kosovo, Liechtenstein, Luxembourg, Ma-xê-đô-ni-a, Man-ta, Montenegro, Mô-na-cô, Na Uy, Pháp, San Marino, Slovakia, Thụy Sĩ, Thụy Điển, Tây Ban Nha, Va-ti-căng, Xlô-ven-ni-a, Xéc-bi, Áo, Ý, Đan Mạch và Đức.
- Summer time starts at the same time in all of Europe (except Moldova), but at different local times, depending on the time zone.
Paraguay
Winter time started
The time was set back một giờ from 00:00 to 23:00 local time.
Vương quốc Anh
Summer time started
The time was set forward một giờ from 01:00 to 02:00 local time.
- Before: Greenwich Mean Time (GMT / UTC +0)
- After: British Summer Time (BST / UTC +1)
- Transition time: 2021-03-28 01:00 UTC
- Applies to all of Vương quốc Anh and its Crown dependencies, including Belfast, Birmingham, Bristol, Cardiff, Edinburgh, Glasgow, Guernsey, Jersey, Leeds, Liverpool, Luân Đôn, Sheffield và Đảo Man.
- Does not apply to overseas territories.
Ai-len
Summer time started
The time was set forward một giờ from 01:00 to 02:00 local time.
- Before: Greenwich Mean Time (GMT / UTC +0)
- After: Irish Standard Time (IST / UTC +1)
- Transition time: 2021-03-28 01:00 UTC
- Applies to all of Ai-len, including Cork, Dublin, Dun Laoghaire và Limerick.
- Contrary to other locations that observe daylight saving time, Ireland has daylight saving time in the winter, and standard time in the summer. Winter time is still one hour behind summer time.
Bồ Đào Nha, Quần Đảo Faroe và Quần đảo Canaria
Summer time started
The time was set forward một giờ from 01:00 to 02:00 local time.
- Before: Western European Time (WET / UTC +0)
- After: Western European Summer Time (WEST / UTC +1)
- Transition time: 2021-03-28 01:00 UTC
- Applies to all of Bồ Đào Nha, Quần Đảo Faroe và Quần đảo Canaria, including Las Palmas, Lisboa, Madeira, Porto, Santa Cruz de Tenerife, Tenerife và Tórshavn.
- Quần đảo Canaria changes time simultaneously with the rest of Tây Ban Nha, but the local time of Quần đảo Canaria is một giờ behind Tây Ban Nha.
Azores, Bồ Đào Nha
Summer time started
The time was set forward một giờ from 00:00 to 01:00 local time.
- Before: Azores Time (AZOT / UTC -1)
- After: Azores Summer Time (AZOST / UTC +0)
- Transition time: 2021-03-28 01:00 UTC
- Applies to all of Azores, including Angra do Heroísmo, Horta và Ponta Delgada.
- Azores changes time simultaneously with the rest of Bồ Đào Nha, but the local time of Azores is một giờ behind Bồ Đào Nha.
Eastern Greenland
Summer time started
The time was set forward một giờ from 00:00 to 01:00 local time.
- Before: Eastern Greenland Time (EGT / UTC -1)
- After: Eastern Greenland Summer Time (EGST / UTC +0)
- Transition time: 2021-03-28 01:00 UTC
- Applies to regions that alternate between EGT and EGST, including Ittoqqortoormiit.
Troll research station, Nam Cực
Summer time started
The time was set forward two hours from 01:00 to 03:00 local time.
- Before: Coordinated Universal Time (UTC / UTC +0)
- After: Central European Summer Time (CEST / UTC +2)
- Transition time: 2021-03-28 01:00 UTC
Thứ Bảy
3
Tháng Tư
Đảo Phục Sinh, Valparaíso, Chile
Winter time started
The time was set back một giờ from 22:00 to 21:00 local time.
- Before: Easter Island Daylight Time (EADT / UTC -5)
- After: Easter Island Standard Time (EAST / UTC -6)
- Transition time: 2021-04-04 03:00 UTC
- Đảo Phục Sinh changes time simultaneously with the rest of Chile, but the local time of Đảo Phục Sinh is two hours behind Chile.
Chủ Nhật
4
Tháng Tư
Chatham Islands, New Zealand
Winter time started
The time was set back một giờ from 03:45 to 02:45 local time.
- Before: Chatham Daylight Time (CHADT / UTC +13:45)
- After: Chatham Standard Time (CHAST / UTC +12:45)
- Transition time: 2021-04-03 14:00 UTC
Niu Di-lân
Winter time started
The time was set back một giờ from 03:00 to 02:00 local time.
- Before: New Zealand Daylight Time (NZDT / UTC +13)
- After: New Zealand Standard Time (NZST / UTC +12)
- Transition time: 2021-04-03 14:00 UTC
- Applies to all of Niu Di-lân, including Auckland, Christchurch và Wellington.
- Does not apply to dependent territories and outlying islands.
Đảo Norfolk
Winter time started
The time was set back một giờ from 03:00 to 02:00 local time.
- Before: Norfolk Daylight Time (NFDT / UTC +12)
- After: Norfolk Time (NFT / UTC +11)
- Transition time: 2021-04-03 15:00 UTC
- Applies to all of Đảo Norfolk.
- Time zone news: Norfolk Island will have daylight saving time
Lord Howe Island, New South Wales, Úc
Winter time started
The time was set back half an hour from 02:00 to 01:30 local time.
- Before: Lord Howe Daylight Time (LHDT / UTC +11)
- After: Lord Howe Standard Time (LHST / UTC +10:30)
- Transition time: 2021-04-03 15:00 UTC
Úc
Winter time started
The time was set back một giờ from 03:00 to 02:00 local time.
Úc has 9 time zones. Most of the country observes DST in the summer. Winter time starts at the same local time in all of Úc, but not simultaneously, due to different time zones.
Australian Eastern Time
- Before: Australian Eastern Daylight Time (AEDT / UTC +11)
- After: Australian Eastern Standard Time (AEST / UTC +10)
- Transition time: 2021-04-03 16:00 UTC
- Applies to regions that alternate between AEST and AEDT, including Canberra, Melbourne, Newcastle, Sydney và Wollongong.
Australian Central Time
- Before: Australian Central Daylight Time (ACDT / UTC +10:30)
- After: Australian Central Standard Time (ACST / UTC +9:30)
- Transition time: 2021-04-03 16:30 UTC
- Applies to regions that alternate between ACST and ACDT, including Adelaide.
Chile
Winter time started
The time was set back một giờ from 00:00 to 23:00 local time.
- Before: Chile Daylight Time (CLDT / UTC -3)
- After: Chile Standard Time (CLT / UTC -4)
- Transition time: 2021-04-04 03:00 UTC
- Applies to all of Chile, including Antofagasta, Puente Alto, Santiago, Valparaíso và Viña del Mar.
- Đảo Phục Sinh changes time simultaneously with the rest of Chile, but the local time of Đảo Phục Sinh is two hours behind Chile.
Mexico (except Quintana Roo, Sonora, Baja California and areas near the United States border)
Summer time started
The time was set forward một giờ from 02:00 to 03:00 local time.
México has 4 time zones. All of Mexico except the states of Quintana Roo and Sonora observe DST in the summer. The state of Baja California and areas near the United States border follow the same DST schedule as the United States, while other DST-observing areas observe DST from 02:00 on the first Sunday of April until 02:00 on the last Sunday of October.
Zona Centro
- Before: Central Standard Time (CST / UTC -6)
- After: Central Daylight Time (CDT / UTC -5)
- Transition time: 2021-04-04 08:00 UTC
- Applies to regions that alternate between CST and CDT, including Ciudad de Mexico, Ecatepec de Morelos, Guadalajara, Iztapalapa và Puebla.
Chủ Nhật
11
Tháng Tư
Maroc và Tây Sahara
Winter time started
The time was set back một giờ from 03:00 to 02:00 local time.
- Before: West Africa Time (WAT / UTC +1)
- After: Greenwich Mean Time (GMT / UTC +0)
- Transition time: 2021-04-11 02:00 UTC
- Applies to all of Maroc và Tây Sahara, including Casablanca, Marrakesh và Rabat.
- Morocco and Western Sahara observe permanent daylight saving time, except during Ramadan, when daylight saving time is suspended.
Chủ Nhật
16
Tháng Năm
Maroc và Tây Sahara
Summer time started
The time was set forward một giờ from 02:00 to 03:00 local time.
- Before: Greenwich Mean Time (GMT / UTC +0)
- After: West Africa Time (WAT / UTC +1)
- Transition time: 2021-05-16 02:00 UTC
- Applies to all of Maroc và Tây Sahara, including Casablanca, Marrakesh và Rabat.
- Morocco and Western Sahara observe permanent daylight saving time, except during Ramadan, when daylight saving time is suspended.
Thứ Bảy
4
Tháng Chín
Đảo Phục Sinh, Valparaíso, Chile
Summer time started
The time was set forward một giờ from 22:00 to 23:00 local time.
- Before: Easter Island Standard Time (EAST / UTC -6)
- After: Easter Island Daylight Time (EADT / UTC -5)
- Transition time: 2021-09-05 04:00 UTC
- Đảo Phục Sinh changes time simultaneously with the rest of Chile, but the local time of Đảo Phục Sinh is two hours behind Chile.
Chủ Nhật
5
Tháng Chín
Chile
Summer time started
The time was set forward một giờ from 00:00 to 01:00 local time.
- Before: Chile Standard Time (CLT / UTC -4)
- After: Chile Daylight Time (CLDT / UTC -3)
- Transition time: 2021-09-05 04:00 UTC
- Applies to all of Chile, including Antofagasta, Puente Alto, Santiago, Valparaíso và Viña del Mar.
- Đảo Phục Sinh changes time simultaneously with the rest of Chile, but the local time of Đảo Phục Sinh is two hours behind Chile.
Thứ Tư
22
Tháng Chín
Iran
Winter time started
The time was set back một giờ from 00:00 to 23:00 local time.
Chủ Nhật
26
Tháng Chín
Chatham Islands, New Zealand
Summer time started
The time was set forward một giờ from 02:45 to 03:45 local time.
- Before: Chatham Standard Time (CHAST / UTC +12:45)
- After: Chatham Daylight Time (CHADT / UTC +13:45)
- Transition time: 2021-09-25 14:00 UTC
Niu Di-lân
Summer time started
The time was set forward một giờ from 02:00 to 03:00 local time.
- Before: New Zealand Standard Time (NZST / UTC +12)
- After: New Zealand Daylight Time (NZDT / UTC +13)
- Transition time: 2021-09-25 14:00 UTC
- Applies to all of Niu Di-lân, including Auckland, Christchurch và Wellington.
- Does not apply to dependent territories and outlying islands.
Chủ Nhật
3
Tháng Mười
Đảo Norfolk
Summer time started
The time was set forward một giờ from 02:00 to 03:00 local time.
- Before: Norfolk Time (NFT / UTC +11)
- After: Norfolk Daylight Time (NFDT / UTC +12)
- Transition time: 2021-10-02 15:00 UTC
- Applies to all of Đảo Norfolk.
- Time zone news: Norfolk Island will have daylight saving time
Lord Howe Island, New South Wales, Úc
Summer time started
The time was set forward half an hour from 02:00 to 02:30 local time.
- Before: Lord Howe Standard Time (LHST / UTC +10:30)
- After: Lord Howe Daylight Time (LHDT / UTC +11)
- Transition time: 2021-10-02 15:30 UTC
Úc
Summer time started
The time was set forward một giờ from 02:00 to 03:00 local time.
Úc has 9 time zones. Most of the country observes DST in the summer. Summer time starts at the same local time in all of Úc, but not simultaneously, due to different time zones.
Australian Eastern Time
- Before: Australian Eastern Standard Time (AEST / UTC +10)
- After: Australian Eastern Daylight Time (AEDT / UTC +11)
- Transition time: 2021-10-02 16:00 UTC
- Applies to regions that alternate between AEST and AEDT, including Canberra, Melbourne, Newcastle, Sydney và Wollongong.
Australian Central Time
- Before: Australian Central Standard Time (ACST / UTC +9:30)
- After: Australian Central Daylight Time (ACDT / UTC +10:30)
- Transition time: 2021-10-02 16:30 UTC
- Applies to regions that alternate between ACST and ACDT, including Adelaide.
Paraguay
Summer time started
The time was set forward một giờ from 00:00 to 01:00 local time.
Thứ Sáu
29
Tháng Mười
Xi-ri
Winter time starts
The time will be set back một giờ from 00:00 to 23:00 local time.
Jordan
Winter time starts
The time will be set back một giờ from 01:00 to 00:00 local time.
Thứ Bảy
30
Tháng Mười
Lãnh thổ Palestine
Winter time starts
The time will be set back một giờ from 01:00 to 00:00 local time.
- Before: Arabia Daylight Time (ADT / UTC +3)
- After: Arabia Standard Time (AST / UTC +2)
- Transition time: 2021-10-29 22:00 UTC
- Applies to all of Lãnh thổ Palestine, including Gaza, Hebron và West Bank.
Western Greenland
Winter time starts
The time will be set back một giờ from 23:00 to 22:00 local time.
- Before: Western Greenland Summer Time (WGST / UTC -2)
- After: Western Greenland Time (WGT / UTC -3)
- Transition time: 2021-10-31 01:00 UTC
- Applies to regions that alternate between WGT and WGST, including Nuuk.
Chủ Nhật
31
Tháng Mười
Liban
Winter time starts
The time will be set back một giờ from 00:00 to 23:00 local time.
Israel
Winter time starts
The time will be set back một giờ from 02:00 to 01:00 local time.
Môn-đô-va
Winter time starts
The time will be set back một giờ from 03:00 to 02:00 local time.
Most of Eastern Europe
Winter time starts
The time will be set back một giờ from 04:00 to 03:00 local time.
- Before: Eastern European Summer Time (EEST / UTC +3)
- After: Eastern European Time (EET / UTC +2)
- Transition time: 2021-10-31 01:00 UTC
- Applies to Bulgaria, Estonia, Hy Lạp, Latvia, Litva, Phần Lan, Quần đảo Aland, Romania, Síp và Ukraina.
- Winter time starts at the same time in all of Europe (except Moldova), but at different local times, depending on the time zone.
Most of Europe
Winter time starts
The time will be set back một giờ from 03:00 to 02:00 local time.
- Before: Central European Summer Time (CEST / UTC +2)
- After: Central European Time (CET / UTC +1)
- Transition time: 2021-10-31 01:00 UTC
- Applies to Albania, Andorra, Ba Lan, Bosna và Hercegovina, Bỉ, Croatia, Cộng hòa Séc, Gibraltar, Hungary, Hà Lan, Kosovo, Liechtenstein, Luxembourg, Ma-xê-đô-ni-a, Man-ta, Montenegro, Mô-na-cô, Na Uy, Pháp, San Marino, Slovakia, Thụy Sĩ, Thụy Điển, Tây Ban Nha, Va-ti-căng, Xlô-ven-ni-a, Xéc-bi, Áo, Ý, Đan Mạch và Đức.
- Winter time starts at the same time in all of Europe (except Moldova), but at different local times, depending on the time zone.
Vương quốc Anh
Winter time starts
The time will be set back một giờ from 02:00 to 01:00 local time.
- Before: British Summer Time (BST / UTC +1)
- After: Greenwich Mean Time (GMT / UTC +0)
- Transition time: 2021-10-31 01:00 UTC
- Applies to all of Vương quốc Anh and its Crown dependencies, including Belfast, Birmingham, Bristol, Cardiff, Edinburgh, Glasgow, Guernsey, Jersey, Leeds, Liverpool, Luân Đôn, Sheffield và Đảo Man.
- Does not apply to overseas territories.
Ai-len
Winter time starts
The time will be set back một giờ from 02:00 to 01:00 local time.
- Before: Irish Standard Time (IST / UTC +1)
- After: Greenwich Mean Time (GMT / UTC +0)
- Transition time: 2021-10-31 01:00 UTC
- Applies to all of Ai-len, including Cork, Dublin, Dun Laoghaire và Limerick.
- Contrary to other locations that observe daylight saving time, Ireland has daylight saving time in the winter, and standard time in the summer. Winter time is still one hour behind summer time.
Bồ Đào Nha, Quần Đảo Faroe và Quần đảo Canaria
Winter time starts
The time will be set back một giờ from 02:00 to 01:00 local time.
- Before: Western European Summer Time (WEST / UTC +1)
- After: Western European Time (WET / UTC +0)
- Transition time: 2021-10-31 01:00 UTC
- Applies to all of Bồ Đào Nha, Quần Đảo Faroe và Quần đảo Canaria, including Las Palmas, Lisboa, Madeira, Porto, Santa Cruz de Tenerife, Tenerife và Tórshavn.
- Quần đảo Canaria changes time simultaneously with the rest of Tây Ban Nha, but the local time of Quần đảo Canaria is một giờ behind Tây Ban Nha.
Azores, Bồ Đào Nha
Winter time starts
The time will be set back một giờ from 01:00 to 00:00 local time.
- Before: Azores Summer Time (AZOST / UTC +0)
- After: Azores Time (AZOT / UTC -1)
- Transition time: 2021-10-31 01:00 UTC
- Applies to all of Azores, including Angra do Heroísmo, Horta và Ponta Delgada.
- Azores changes time simultaneously with the rest of Bồ Đào Nha, but the local time of Azores is một giờ behind Bồ Đào Nha.
Eastern Greenland
Winter time starts
The time will be set back một giờ from 01:00 to 00:00 local time.
- Before: Eastern Greenland Summer Time (EGST / UTC +0)
- After: Eastern Greenland Time (EGT / UTC -1)
- Transition time: 2021-10-31 01:00 UTC
- Applies to regions that alternate between EGT and EGST, including Ittoqqortoormiit.
Troll research station, Nam Cực
Winter time starts
The time will be set back two hours from 03:00 to 01:00 local time.
- Before: Central European Summer Time (CEST / UTC +2)
- After: Coordinated Universal Time (UTC / UTC +0)
- Transition time: 2021-10-31 01:00 UTC
Mexico (except Quintana Roo, Sonora, Baja California and areas near the United States border)
Winter time starts
The time will be set back một giờ from 02:00 to 01:00 local time.
México has 4 time zones. All of Mexico except the states of Quintana Roo and Sonora observe DST in the summer. The state of Baja California and areas near the United States border follow the same DST schedule as the United States, while other DST-observing areas observe DST from 02:00 on the first Sunday of April until 02:00 on the last Sunday of October.
Zona Centro
- Before: Central Daylight Time (CDT / UTC -5)
- After: Central Standard Time (CST / UTC -6)
- Transition time: 2021-10-31 07:00 UTC
- Applies to regions that alternate between CST and CDT, including Ciudad de Mexico, Ecatepec de Morelos, Guadalajara, Iztapalapa và Puebla.
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Saint Pierre và Miquelon
Winter time starts
The time will be set back một giờ from 02:00 to 01:00 local time.
- Before: Saint Pierre and Miquelon Daylight Time (PMDT / UTC -2)
- After: Saint Pierre and Miquelon Standard Time (PMST / UTC -3)
- Transition time: 2021-11-07 04:00 UTC
Cuba
Winter time starts
The time will be set back một giờ from 01:00 to 00:00 local time.
- Before: Cuba Daylight Time (CDT / UTC -4)
- After: Cuba Standard Time (CST / UTC -5)
- Transition time: 2021-11-07 05:00 UTC
- Applies to all of Cuba, including La Habana, Santa Clara và Santiago de Cuba.
Bermuda
Winter time starts
The time will be set back một giờ from 02:00 to 01:00 local time.
- Before: Atlantic Daylight Time (ADT / UTC -3)
- After: Atlantic Standard Time (AST / UTC -4)
- Transition time: 2021-11-07 05:00 UTC
- Applies to all of Bermuda.
Thule, Băng Đảo
Winter time starts
The time will be set back một giờ from 02:00 to 01:00 local time.
- Before: Atlantic Daylight Time (ADT / UTC -3)
- After: Atlantic Standard Time (AST / UTC -4)
- Transition time: 2021-11-07 05:00 UTC
- Applies to all of Thule.
Hoa Kỳ
Winter time starts
The time will be set back một giờ from 02:00 to 01:00 local time.
Hoa Kỳ has 11 time zones. Most of the country observes DST in the summer. Winter time starts at the same local time in all of Hoa Kỳ, but not simultaneously, due to different time zones.
Eastern Time
- Before: Eastern Daylight Time (EDT / UTC -4)
- After: Eastern Standard Time (EST / UTC -5)
- Transition time: 2021-11-07 06:00 UTC
- Applies to regions that alternate between EST and EDT, including Miami, Philadelphia, Thành phố New York và Washington, D.C..
Central Time
- Before: Central Daylight Time (CDT / UTC -5)
- After: Central Standard Time (CST / UTC -6)
- Transition time: 2021-11-07 07:00 UTC
- Applies to regions that alternate between CST and CDT, including Austin, Chicago, Dallas, Houston và San Antonio.
Mountain Time
- Before: Mountain Daylight Time (MDT / UTC -6)
- After: Mountain Standard Time (MST / UTC -7)
- Transition time: 2021-11-07 08:00 UTC
- Applies to regions that alternate between MST and MDT, including Albuquerque, Denver và El Paso.
Pacific Time
- Before: Pacific Daylight Time (PDT / UTC -7)
- After: Pacific Standard Time (PST / UTC -8)
- Transition time: 2021-11-07 09:00 UTC
- Applies to regions that alternate between PST and PDT, including Las Vegas, Los Angeles, Portland, San Diego, San Francisco, San Jose và Seattle.
Alaska Time
Alaska: Islands west of -169.5°
- Before: Hawaii-Aleutian Daylight Time (HADT / UTC -9)
- After: Hawaii-Aleutian Standard Time (HAST / UTC -10)
- Transition time: 2021-11-07 11:00 UTC
Ca-na-đa
Winter time starts
The time will be set back một giờ from 02:00 to 01:00 local time.
Ca-na-đa has 6 time zones. Most of the country observes DST in the summer. Winter time starts at the same local time in all of Ca-na-đa, but not simultaneously, due to different time zones.
Newfoundland Time
- Before: Newfoundland Daylight Time (NDT / UTC -2:30)
- After: Newfoundland Standard Time (NST / UTC -3:30)
- Transition time: 2021-11-07 04:30 UTC
Atlantic Time
- Before: Atlantic Daylight Time (ADT / UTC -3)
- After: Atlantic Standard Time (AST / UTC -4)
- Transition time: 2021-11-07 05:00 UTC
- Applies to regions that alternate between AST and ADT, including New Brunswick, Nova Scotia và Đảo Hoàng tử Edward.
Eastern Time
Central Time
- Before: Central Daylight Time (CDT / UTC -5)
- After: Central Standard Time (CST / UTC -6)
- Transition time: 2021-11-07 07:00 UTC
- Applies to regions that alternate between CST and CDT, including Manitoba.
Mountain Time
Bahamas
Winter time starts
The time will be set back một giờ from 02:00 to 01:00 local time.
Haiti
Winter time starts
The time will be set back một giờ from 02:00 to 01:00 local time.
- Before: Eastern Daylight Time (EDT / UTC -4)
- After: Eastern Standard Time (EST / UTC -5)
- Transition time: 2021-11-07 06:00 UTC
- Applies to all of Haiti, including Port-au-Prince.
Quần Đảo Turk và Caicos
Winter time starts
The time will be set back một giờ from 02:00 to 01:00 local time.
- Before: Eastern Daylight Time (EDT / UTC -4)
- After: Eastern Standard Time (EST / UTC -5)
- Transition time: 2021-11-07 06:00 UTC
- Applies to all of Quần Đảo Turk và Caicos, including Cockburn Town.
Mexico (the state of Baja California and areas near the United States border)
Winter time starts
The time will be set back một giờ from 02:00 to 01:00 local time.
México has 4 time zones. All of Mexico except the states of Quintana Roo and Sonora observe DST in the summer. The state of Baja California and areas near the United States border follow the same DST schedule as the United States, while other DST-observing areas observe DST from 02:00 on the first Sunday of April until 02:00 on the last Sunday of October.
Zona Noroeste
US border regions in Zona Centro
- Before: Central Daylight Time (CDT / UTC -5)
- After: Central Standard Time (CST / UTC -6)
- Transition time: 2021-11-07 07:00 UTC
- Applies to US border regions that alternate between CST and CDT, including Matamoros, Nuevo Laredo và Reynosa.
US border regions in Zona Pacífico
- Before: Mountain Daylight Time (MDT / UTC -6)
- After: Mountain Standard Time (MST / UTC -7)
- Transition time: 2021-11-07 08:00 UTC
- Applies to US border regions that alternate between MST and MDT, including Ciudad Juárez.
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Fiji
Summer time starts
The time will be set forward một giờ from 02:00 to 03:00 local time.
- Before: Fiji Time (FJT / UTC +12)
- After: Fiji Summer Time (FJST / UTC +13)
- Transition time: 2021-11-13 14:00 UTC
- Applies to all of Fiji.
- Time zone news: New start date for DST in Fiji