1738
| Millennium: | 2nd millennium |
|---|---|
| Centuries: | 17th century – 18th century – 19th century |
| Decades: | 1700s 1710s 1720s – 1730s – 1740s 1750s 1760s |
| Years: | 1735 1736 1737 – 1738 – 1739 1740 1741 |
| Gregorian calendar | 1738 MDCCXXXVIII |
| Ab urbe condita | 2491 |
| Armenian calendar | 1187 ԹՎ ՌՃՁԷ |
| Assyrian calendar | 6488 |
| Balinese saka calendar | 1659–1660 |
| Bengali calendar | 1145 |
| Berber calendar | 2688 |
| British Regnal year | 11 Geo. 2 – 12 Geo. 2 |
| Buddhist calendar | 2282 |
| Burmese calendar | 1100 |
| Byzantine calendar | 7246–7247 |
| Chinese calendar | 丁巳年 (Fire Snake) 4434 or 4374 — to — 戊午年 (Earth Horse) 4435 or 4375 |
| Coptic calendar | 1454–1455 |
| Discordian calendar | 2904 |
| Ethiopian calendar | 1730–1731 |
| Hebrew calendar | 5498–5499 |
| Hindu calendars | |
| - Vikram Samvat | 1794–1795 |
| - Shaka Samvat | 1659–1660 |
| - Kali Yuga | 4838–4839 |
| Holocene calendar | 11738 |
| Igbo calendar | 738–739 |
| Iranian calendar | 1116–1117 |
| Islamic calendar | 1150–1151 |
| Japanese calendar | Genbun 3 (元文３年) |
| Javanese calendar | 1662–1663 |
| Julian calendar | Gregorian minus 11 days |
| Korean calendar | 4071 |
| Minguo calendar | 174 before ROC 民前174年 |
| Nanakshahi calendar | 270 |
| Thai solar calendar | 2280–2281 |
| Tibetan calendar | 阴火蛇年 (female Fire-Snake) 1864 or 1483 or 711 — to — 阳土马年 (male Earth-Horse) 1865 or 1484 or 712 |
1738 (MDCCXXXVIII) was a common year starting on Wednesday of the Gregorian calendar and a common year starting on Sunday of the Julian calendar, the 1738th year of the Common Era (CE) and Anno Domini (AD) designations, the 738th year of the 2nd millennium, the 38th year of the 18th century, and the 9th year of the 1730s decade. As of the start of 1738, the Gregorian calendar was 11 days ahead of the Julian calendar, which remained in localized use until 1923.