Calendar era

A calendar era is the period of time elapsed since one epoch of a calendar and, if it exists, before the next one.[1] For example, it is the year 2022 as per the Gregorian calendar, which numbers its years in the Western Christian era (the Coptic Orthodox and Ethiopian Orthodox churches have their own Christian eras).

2022 in various calendars
Gregorian calendar2022
MMXXII
Ab urbe condita2775
Armenian calendar1471
ԹՎ ՌՆՀԱ
Assyrian calendar6772
Baháʼí calendar178–179
Balinese saka calendar1943–1944
Bengali calendar1429
Berber calendar2972
British Regnal year70 Eliz. 2  1 Cha. 3
Buddhist calendar2566
Burmese calendar1384
Byzantine calendar7530–7531
Chinese calendar辛丑年 (Metal Ox)
4718 or 4658
     to 
壬寅年 (Water Tiger)
4719 or 4659
Coptic calendar1738–1739
Discordian calendar3188
Ethiopian calendar2014–2015
Hebrew calendar5782–5783
Hindu calendars
 - Vikram Samvat2078–2079
 - Shaka Samvat1943–1944
 - Kali Yuga5122–5123
Holocene calendar12022
Igbo calendar1022–1023
Iranian calendar1400–1401
Islamic calendar1443–1444
Japanese calendarReiwa 4
(令和4年)
Javanese calendar1955–1956
Juche calendar111
Julian calendarGregorian minus 13 days
Korean calendar4355
Minguo calendarROC 111
民國111年
Nanakshahi calendar554
Thai solar calendar2565
Tibetan calendar阴金牛年
(female Iron-Ox)
2148 or 1767 or 995
     to 
阳水虎年
(male Water-Tiger)
2149 or 1768 or 996
Unix time1640995200 – 1672531199

In antiquity, regnal years were counted from the accession of a monarch. This makes the chronology of the ancient Near East very difficult to reconstruct, based on disparate and scattered king lists, such as the Sumerian King List and the Babylonian Canon of Kings. In East Asia, reckoning by era names chosen by ruling monarchs ceased in the 20th century except for Japan, where they are still used.


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