December solstice

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UT date and time of
equinoxes and solstices on Earth[1][2]
event equinox solstice equinox solstice
month March June September December
year day time day time day time day time
2016 20 04:31 20 22:35 22 14:21 21 10:45
2017 20 10:29 21 04:25 22 20:02 21 16:29
2018 20 16:15 21 10:07 23 01:54 21 22:22
2019 20 21:58 21 15:54 23 07:50 22 04:19
2020 20 03:50 20 21:43 22 13:31 21 10:03
2021 20 09:37 21 03:32 22 19:21 21 15:59
2022 20 15:33 21 09:14 23 01:04 21 21:48
2023 20 21:25 21 14:58 23 06:50 22 03:28
2024 20 03:07 20 20:51 22 12:44 21 09:20
2025 20 09:02 21 02:42 22 18:20 21 15:03
2026 20 14:46 21 08:25 23 00:06 21 20:50
Illumination of Earth by the Sun on the day of the December solstice

The December solstice, also known as the southern solstice, is the solstice that occurs each December – typically on 21 December, but may vary by one day in either direction according to the Gregorian calendar. In the Northern Hemisphere, the December solstice is the winter solstice, whilst in the Southern Hemisphere it is the summer solstice.

Solar year[edit]

The December solstice solar year is the solar year based on the December solstice. It is thus the length of time between adjacent December solstices.

The length of the December solstice year has been relatively stable between 6000 BC and 2000 at 49:30 (minutes:seconds) to 50:00 in excess of 365 days and 5 hours. After 2000, it is getting shorter. In 4000, the excess time will be 48:52 and, in 10000, 46:45.[3]

The length of the day near the December solstice[edit]

The following tables contain information on the length of the day on December 22nd, close to the winter solstice of the Northern Hemisphere and the summer solstice of the Southern Hemisphere (i.e. December solstice). The data was collected from the website of the Finnish Meteorological Institute on 22 December 2015, as well as from certain other websites.[4][5][6][7][8][9]

The data is arranged geographically and within the tables from the shortest day to the longest one.

The Nordic countries and the Baltic states
City Sunrise
22 Dec 2015
Sunset
22 Dec 2015
Length of the day
Murmansk 0 h
Bodø 11:36 12:25 0 h 49 min
Rovaniemi 11:08 13:22 2 h 14 min
Luleå 9:55 13:04 3 h 08 min
Reykjavík 11:22 15:29 4 h 07 min
Trondheim 10:01 14:31 4 h 30 min
Tórshavn 9:51 14:59 5 h 08 min
Helsinki 9:24 15:13 5 h 49 min
Oslo 9:18 15:12 5 h 54 min
Tallinn 9:17 15:20 6 h 02 min
Stockholm 8:43 14:48 6 h 04 min
Riga 9:00 15:43 6 h 43 min
Copenhagen 8:37 15:38 7 h 01 min
Vilnius 8:40 15:54 7 h 14 min
Europe
City Sunrise
22 Dec 2015
Sunset
22 Dec 2015
Length of the day
Edinburgh 8:42 15:40 6 h 57 min
Moscow 8:57 15:58 7 h 00 min
Berlin 8:15 15:54 7 h 39 min
Warsaw 7:43 15:25 7 h 42 min
London 8:04 15:53 7 h 49 min
Kyiv 7:56 15:56 8 h 00 min
Paris 8:41 16:56 8 h 14 min
Vienna 7:42 16:03 8 h 20 min
Budapest 7:28 15:55 8 h 26 min
Rome 7:34 16:42 9 h 07 min
Madrid 8:34 17:51 9 h 17 min
Lisbon 7:51 17:18 9 h 27 min
Athens 7:37 17:09 9 h 31 min
Africa
City Sunrise
22 Dec 2015
Sunset
22 Dec 2015
Length of the day
Cairo 6:47 16:59 10 h 12 min
Tenerife 7:53 18:13 10 h 19 min
Dakar 7:30 18:46 11 h 15 min
Addis Ababa 6:35 18:11 11 h 36 min
Nairobi 6:25 18:37 12 h 11 min
Kinshasa 5:45 18:08 12 h 22 min
Dar es Salaam 6:05 18:36 12 h 31 min
Luanda 5:46 18:24 12 h 38 min
Antananarivo 5:10 18:26 13 h 16 min
Windhoek 6:04 19:35 13 h 31 min
Johannesburg 5:12 18:59 13 h 47 min
Cape Town 5:32 19:57 14 h 25 min
Americas
City Sunrise
22 Dec 2015
Sunset
22 Dec 2015
Length of the day
Inuvik 0 h
Fairbanks 10:58 14:40 3 h 41 min
Nuuk 10:22 14:28 4 h 06 min
Anchorage 10:14 15:42 5 h 27 min
Edmonton 8:48 16:15 7 h 27 min
Vancouver 8:05 16:16 8 h 11 min
Seattle 7:55 16:20 8 h 25 min
Ottawa 7:39 16:22 8 h 42 min
Toronto 7:48 16:43 8 h 55 min
New York City 7:16 16:32 9 h 15 min
Washington, D.C. 7:23 16:49 9 h 26 min
Los Angeles 6:55 16:48 9 h 53 min
Dallas 7:25 17:25 9 h 59 min
Miami 7:03 17:35 10 h 31 min
Honolulu 7:04 17:55 10 h 50 min
Mexico City 7:06 18:03 10 h 57 min
Managua 6:01 17:26 11 h 24 min
Bogotá 5:59 17:50 11 h 51 min
Quito 6:08 18:16 12 h 08 min
Recife 5:00 17:35 12 h 35 min
Lima 5:41 18:31 12 h 50 min
La Paz 5:57 19:04 13 h 06 min
Rio de Janeiro 6:04 19:37 13 h 33 min
São Paulo 6:17 19:52 13 h 35 min
Porto Alegre 6:20 20:25 14 h 05 min
Santiago 6:29 20:52 14 h 22 min
Buenos Aires 5:37 20:06 14 h 28 min
Ushuaia 4:51 22:11 17 h 19 min
Asia and Oceania
City Sunrise
22 Dec 2015
Sunset
22 Dec 2015
Length of the day
Magadan 8:54 14:55 6 h 00 min
Petropavlovsk 9:36 17:10 7 h 33 min
Khabarovsk 8:48 17:07 8 h 18 min
Ulaanbaatar 8:39 17:02 8 h 22 min
Vladivostok 8:40 17:40 8 h 59 min
Beijing 7:32 16:52 9 h 20 min
Seoul 7:44 17:17 9 h 34 min
Tokyo 6:47 16:31 9 h 44 min
Shanghai 6:48 16:55 10 h 07 min
Lhasa 8:46 19:01 10 h 14 min
Delhi 7:09 17:28 10 h 19 min
Hong Kong 6:58 17:44 10 h 46 min
Manila 6:16 17:32 11 h 15 min
Bangkok 6:36 17:55 11 h 19 min
Singapore 7:01 19:04 12 h 03 min
Jakarta 5:36 18:05 12 h 28 min
Denpasar 5:58 18:36 12 h 37 min
Darwin 6:19 19:10 12 h 51 min
Papeete 5:21 18:32 13 h 10 min
Brisbane 4:49 18:42 13 h 52 min
Perth 5:07 19:22 14 h 14 min
Sydney 5:41 20:05 14 h 24 min
Auckland 5:58 20:39 14 h 41 min
Melbourne 5:54 20:42 14 h 47 min
Invercargill 5:50 21:39 15 h 48 min

References[edit]

  1. ^ United States Naval Observatory (4 January 2018). "Earth's Seasons and Apsides: Equinoxes, Solstices, Perihelion, and Aphelion". Archived from the original on 24 December 2017. Retrieved 18 September 2018.
  2. ^ "Solstices and Equinoxes: 2001 to 2100". AstroPixels.com. 20 February 2018. Retrieved 21 December 2018.
  3. ^ Bromberg, Irv. "Solar Year Length Variations on Earth" (PDF). University of Toronto, Canada. Retrieved 21 December 2012.
  4. ^ "Paikallissää Helsinki" [‘Local weather in Helsinki’] (in Finnish). Finnish Meteorological Institute. 22 December 2015. Retrieved 22 December 2015.
  5. ^ "Perth, Australia". Retrieved 22 December 2015.
  6. ^ "São Paulo, Brazil". Retrieved 22 December 2015.
  7. ^ "Denpasar, Indonesia". Retrieved 22 December 2015.
  8. ^ "Edmonton, Canada". Retrieved 21 December 2019.
  9. ^ "Inuvik, Canada". Retrieved 19 December 2020.