| Millennium: | 2nd millennium |
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| Centuries: |
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| Decades: |
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| Years: |
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| 1739 by topic |
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| Arts and science |
| Countries |
| Lists of leaders |
| Birth and death categories |
| Establishments and disestablishments categories |
| Works category |
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| Gregorian calendar | 1739 MDCCXXXIX |
| Ab urbe condita | 2492 |
| Armenian calendar | 1188 ԹՎ ՌՃՁԸ |
| Assyrian calendar | 6489 |
| Balinese saka calendar | 1660–1661 |
| Bengali calendar | 1146 |
| Berber calendar | 2689 |
| British Regnal year | 12 Geo. 2 – 13 Geo. 2 |
| Buddhist calendar | 2283 |
| Burmese calendar | 1101 |
| Byzantine calendar | 7247–7248 |
| Chinese calendar | 戊午年 (Earth Horse) 4436 or 4229 — to — 己未年 (Earth Goat) 4437 or 4230 |
| Coptic calendar | 1455–1456 |
| Discordian calendar | 2905 |
| Ethiopian calendar | 1731–1732 |
| Hebrew calendar | 5499–5500 |
| Hindu calendars | |
| - Vikram Samvat | 1795–1796 |
| - Shaka Samvat | 1660–1661 |
| - Kali Yuga | 4839–4840 |
| Holocene calendar | 11739 |
| Igbo calendar | 739–740 |
| Iranian calendar | 1117–1118 |
| Islamic calendar | 1151–1152 |
| Japanese calendar | Genbun4 (元文4年) |
| Javanese calendar | 1663–1664 |
| Julian calendar | Gregorian minus 11 days |
| Korean calendar | 4072 |
| Minguo calendar | 173 before ROC 民前173年 |
| Nanakshahi calendar | 271 |
| Thai solar calendar | 2281–2282 |
| Tibetan calendar | 阳土马年 (male Earth-Horse) 1865 or 1484 or 712 — to — 阴土羊年 (female Earth-Goat) 1866 or 1485 or 713 |
1739 (MDCCXXXIX) was a common year starting on Thursday of the Gregorian calendar and a common year starting on Monday of the Julian calendar, the 1739th year of the Common Era (CE) and Anno Domini (AD) designations, the 739th year of the 2nd millennium, the 39th year of the 18th century, and the 10th and last year of the 1730s decade. As of the start of 1739, the Gregorian calendar was 11 days ahead of the Julian calendar, which remained in localized use until 1923.
