Millennium: 2nd millennium
1972 in various calendars
Gregorian calendar1972
Ab urbe condita2725
Armenian calendar1421
Assyrian calendar6722
Bahá'í calendar128–129
Balinese saka calendar1893–1894
Bengali calendar1379
Berber calendar2922
British Regnal year20 Eliz. 2 – 21 Eliz. 2
Buddhist calendar2516
Burmese calendar1334
Byzantine calendar7480–7481
Chinese calendar辛亥(Metal Pig)
4668 or 4608
    — to —
壬子年 (Water Rat)
4669 or 4609
Coptic calendar1688–1689
Discordian calendar3138
Ethiopian calendar1964–1965
Hebrew calendar5732–5733
Hindu calendars
 - Vikram Samvat2028–2029
 - Shaka Samvat1893–1894
 - Kali Yuga5072–5073
Holocene calendar11972
Igbo calendar972–973
Iranian calendar1350–1351
Islamic calendar1391–1392
Japanese calendarShōwa 47
Javanese calendar1903–1904
Juche calendar61
Julian calendarGregorian minus 13 days
Korean calendar4305
Minguo calendarROC 61
Nanakshahi calendar504
Thai solar calendar2515
Tibetan calendar阴金猪年
(female Iron-Pig)
2098 or 1717 or 945
    — to —
(male Water-Rat)
2099 or 1718 or 946
Unix time63072000 – 94694399

1972 (MCMLXXII) was a leap year starting on Saturday of the Gregorian calendar, the 1972nd year of the Common Era (CE) and Anno Domini (AD) designations, the 972nd year of the 2nd millennium, the 72nd year of the 20th century, and the 3rd year of the 1970s decade.

Within the context of Coordinated Universal Time (UTC) it was the longest year ever, as two leap seconds were added during this 366-day year, an event which has not since been repeated. (If its start and end are defined using mean solar time [the legal time scale], its duration was 31622401.141 seconds of Terrestrial Time (or Ephemeris Time), which is slightly shorter than 1908).[1]