1731
| Years |
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| Millennium |
| 2nd millennium |
| Centuries |
| Decades |
| Years |
| 1731 by topic |
|---|
| Arts, history, and science |
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| Countries |
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| Lists of leaders |
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| Birth and death categories |
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| Establishments and disestablishments categories |
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| Works category |
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| Gregorian calendar | 1731 MDCCXXXI |
| Ab urbe condita | 2484 |
| Armenian calendar | 1180 ԹՎ ՌՃՁ |
| Assyrian calendar | 6481 |
| Balinese saka calendar | 1652–1653 |
| Bengali calendar | 1138 |
| Berber calendar | 2681 |
| British Regnal year | 4 Geo. 2 – 5 Geo. 2 |
| Buddhist calendar | 2275 |
| Burmese calendar | 1093 |
| Byzantine calendar | 7239–7240 |
| Chinese calendar | 庚戌年 (Metal Dog) 4427 or 4367 — to — 辛亥年 (Metal Pig) 4428 or 4368 |
| Coptic calendar | 1447–1448 |
| Discordian calendar | 2897 |
| Ethiopian calendar | 1723–1724 |
| Hebrew calendar | 5491–5492 |
| Hindu calendars | |
| - Vikram Samvat | 1787–1788 |
| - Shaka Samvat | 1652–1653 |
| - Kali Yuga | 4831–4832 |
| Holocene calendar | 11731 |
| Igbo calendar | 731–732 |
| Iranian calendar | 1109–1110 |
| Islamic calendar | 1143–1144 |
| Japanese calendar | Kyōhō 16 (享保１６年) |
| Javanese calendar | 1655–1656 |
| Julian calendar | Gregorian minus 11 days |
| Korean calendar | 4064 |
| Minguo calendar | 181 before ROC 民前181年 |
| Nanakshahi calendar | 263 |
| Thai solar calendar | 2273–2274 |
| Tibetan calendar | ལྕགས་ཕོ་ཁྱི་ལོ་ (male Iron-Dog) 1857 or 1476 or 704 — to — ལྕགས་མོ་ཕག་ལོ་ (female Iron-Boar) 1858 or 1477 or 705 |
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1731 (MDCCXXXI) was a common year starting on Monday in the Gregorian calendar and a common year starting on Friday in the Julian calendar.
Events
- Benjamin Franklin starts the Library Company of Philadelphia.