1972
| Millennium: | 2nd millennium |
|---|---|
| Centuries: | |
| Decades: | |
| Years: |
| Gregorian calendar | 1972 MCMLXXII |
| Ab urbe condita | 2725 |
| Armenian calendar | 1421 ԹՎ ՌՆԻԱ |
| Assyrian calendar | 6722 |
| Bahá'í calendar | 128–129 |
| Bengali calendar | 1379 |
| Berber calendar | 2922 |
| British Regnal year | 20 Eliz. 2 – 21 Eliz. 2 |
| Buddhist calendar | 2516 |
| Burmese calendar | 1334 |
| Byzantine calendar | 7480–7481 |
| Chinese calendar |
辛亥年 (Metal Pig) 4668 or 4608 — to — 壬子年 (Water Rat) 4669 or 4609 |
| Coptic calendar | 1688–1689 |
| Discordian calendar | 3138 |
| Ethiopian calendar | 1964–1965 |
| Hebrew calendar | 5732–5733 |
| Hindu calendars | |
| - Vikram Samvat | 2028–2029 |
| - Shaka Samvat | 1893–1894 |
| - Kali Yuga | 5072–5073 |
| Holocene calendar | 11972 |
| Igbo calendar | 972–973 |
| Iranian calendar | 1350–1351 |
| Islamic calendar | 1391–1392 |
| Japanese calendar |
Shōwa 47 (昭和４７年) |
| Javanese calendar | 1903–1904 |
| Juche calendar | 61 |
| Julian calendar | Gregorian minus 13 days |
| Korean calendar | 4305 |
| Minguo calendar |
ROC 61 民國61年 |
| Nanakshahi calendar | 504 |
| Thai solar calendar | 2515 |
| Unix time | 63072000 – 94694399 |
1972 (MCMLXXII) was a leap year starting on Saturday (dominical letter BA) 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).
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