Year

One year is about 365 days long (except in a leap year). It is the time it takes the Earth to go completely around (orbit) the sun once. A year is actually 365¼ days long, but a calendar has 365 days, except in a leap year.

The year starts on January 1 and ends on December 31 in the Gregorian calendar, but a fiscal year or a school year can start on a different day of the year.

There are several ways used to measure the length of a year.

  • a solar year is based on the seasons. The Gregorian calendar is based on the solar year. The solar year is 365 days long.
  • a lunar year is based on the moon and is usually 12 lunar months (29 days, 12 hours, 44 minutes each) or 354 days long.
  • a tropical year is the time between two vernal equinoxes, the first day of spring when the lengths of daylight and night are the same.
  • a sidereal year measures the time between when a selected fixed star is highest in the night sky.
  • an anomalistic year is the difference between the times when the Earth gets closest to the sun.
  • an eclipse year is the time between node passages. This is when the sun moves through a part of the sky where it is possible for the sun, Earth and moon to be in a line. It is also when eclipses can happen.

Solar and lunar years are used by different calendars for daily life. The other measurements are used by astronomers.

  • There was no year numbered "year zero" in a normal system of counting, because it would mean there is a year earlier than the first year, which was the year AD one in the Anno Domini system, also called 1 CE in the Common Era, used with our Gregorian calendar. However, some astronomers call the year 1 BC (or BCE) "year 0" to make it easier for them to count leap years before that year.
  • Ma (for megaannum) — a unit of time equal to one million years. The suffix "Ma" is often used in scientific disciplines such as geology, paleontology, and astronomy to signify very long time periods into the past or future. The simpler term "mya" for "million years ago" is generally preferred on this wiki as being intuitively more simple for non-technical readers.
Year

January | February | March | April | May | June | July | August | September | October |November | December

Other Languages
Afrikaans: Jaar
Alemannisch: Jahr
አማርኛ: አመት
Ænglisc: Gēar
Аҧсшәа: Ашықәс
العربية: سنة
aragonés: Anyo
armãneashti: Anu
অসমীয়া: বছৰ
asturianu: Añu
Avañe'ẽ: Ro'y
Aymar aru: Mara
azərbaycanca: İl
تۆرکجه: ایل
বাংলা: বছর
Bân-lâm-gú:
Basa Banyumasan: Taun
башҡортса: Йыл
беларуская: Год
беларуская (тарашкевіца)‎: Год
भोजपुरी: साल
български: Година
Boarisch: Joar
བོད་ཡིག: ལོ་
bosanski: Godina
brezhoneg: Bloaz
буряад: Жэл
català: Any
Чӑвашла: Çулталăк
Cebuano: Tuig
čeština: Rok
Chamoru: Såkkan
chiShona: Gore
Cymraeg: Blwyddyn
dansk: År
davvisámegiella: Jahki
Deutsch: Jahr
dolnoserbski: Lěto
eesti: Aasta
Ελληνικά: Έτος
emiliàn e rumagnòl: An
English: Year
эрзянь: Ие
español: Año
Esperanto: Jaro
estremeñu: Añu
euskara: Urte
فارسی: سال
Fiji Hindi: Saal
føroyskt: Ár
Frysk: Jier
furlan: An
Gaeilge: Bliain
Gaelg: Blein
Gàidhlig: Bliadhna
贛語:
ગુજરાતી: વર્ષ
𐌲𐌿𐍄𐌹𐍃𐌺: 𐌾𐌴𐍂
客家語/Hak-kâ-ngî: Ngièn
한국어:
Hausa: Shekara
Hawaiʻi: Makahiki
հայերեն: Տարի
हिन्दी: वर्ष
hornjoserbsce: Lěto
hrvatski: Godina
Ido: Yaro
Ilokano: Tawen
Bahasa Indonesia: Tahun
interlingua: Anno
ᐃᓄᒃᑎᑐᑦ/inuktitut: ᐅᑭᐅᖅ
Iñupiak: Ukiuq
Ирон: Аз
íslenska: Ár
italiano: Anno
עברית: שנה
Basa Jawa: Taun
ಕನ್ನಡ: ವರ್ಷ
къарачай-малкъар: Джыл
ქართული: წელი
kaszëbsczi: Rok
қазақша: Жыл
kernowek: Bledhen
Kinyarwanda: Umwaka
Kiswahili: Mwaka
Kreyòl ayisyen: Lane
kurdî: Sal
Кыргызча: Жыл
кырык мары: И
Ladino: Anyo
лезги: Йис
ລາວ: ປີ
Latina: Annus
latviešu: Gads
Lëtzebuergesch: Joer
lietuvių: Metai
Limburgs: Jaor
Livvinkarjala: Vuozi
la .lojban.: nanca
lumbaart: Ann
magyar: Év
मैथिली: साल
македонски: Година
Malagasy: Taona
മലയാളം: വർഷം
Māori: Tau
मराठी: वर्ष
مصرى: سنه
Bahasa Melayu: Tahun
Baso Minangkabau: Tahun
Mìng-dĕ̤ng-ngṳ̄: Nièng
монгол: Жил
မြန်မာဘာသာ: သက္ကရာဇ်
Nederlands: Jaar
नेपाली: वर्ष
नेपाल भाषा: दँ
日本語:
Napulitano: Anno
нохчийн: Шо
Nordfriisk: Juar
norsk: År
norsk nynorsk: År
Nouormand: Aun
occitan: Annada
олык марий: Идалык
oʻzbekcha/ўзбекча: Yil
پنجابی: ورہ
پښتو: کال
Patois: Ier
Tok Pisin: Yia
Plattdüütsch: Johr
polski: Rok
português: Ano
română: An
Romani: Bersh
Runa Simi: Wata
русиньскый: Рік
русский: Год
саха тыла: Сыл
संस्कृतम्: वर्षः
sardu: Annu
Scots: Year
Sesotho sa Leboa: Ngwaga
shqip: Viti
sicilianu: Annu
සිංහල: වර්ෂය
سنڌي: سال
slovenčina: Rok
slovenščina: Leto
ślůnski: Rok (czas)
Soomaaliga: Sanad
کوردی: ساڵ
Sranantongo: Yari
српски / srpski: Година
srpskohrvatski / српскохрватски: Godina
Basa Sunda: Taun
suomi: Vuosi
svenska: År
Tagalog: Taon
தமிழ்: ஆண்டு
татарча/tatarça: Ел
తెలుగు: సంవత్సరము
ไทย: ปี
тоҷикӣ: Солҳо
Türkçe: Yıl
українська: Рік
اردو: سال
Vahcuengh: Bi
vèneto: An
Tiếng Việt: Năm
Võro: Aastak
walon: Anêye
West-Vlams: Joar
Winaray: Tuig
Wolof: At
吴语:
ייִדיש: יאר
Yorùbá: Ọdún
粵語:
Zeêuws: Jaer
žemaitėška: Metā
中文:
डोटेली: वर्ष
ГӀалгӀай: Шу
Kabɩyɛ: Pɩnaɣ