1638
| Millennium: | 2nd millennium |
|---|---|
| Centuries: | |
| Decades: | |
| Years: |
| 1638 by topic: | |
| Arts and Science | |
| Architecture - Art - Literature - Music - Science | |
| Lists of leaders | |
| State leaders – Colonial governors – Religious leaders | |
| Birth and death categories | |
| Births - Deaths | |
| Establishments and disestablishments categories | |
| Establishments - Disestablishments | |
| Works category | |
| Works | |
| Gregorian calendar | 1638 MDCXXXVIII |
| Ab urbe condita | 2391 |
| Armenian calendar | 1087 ԹՎ ՌՁԷ |
| Assyrian calendar | 6388 |
| Bengali calendar | 1045 |
| Berber calendar | 2588 |
| English Regnal year | 13 Cha. 1 – 14 Cha. 1 |
| Buddhist calendar | 2182 |
| Burmese calendar | 1000 |
| Byzantine calendar | 7146–7147 |
| Chinese calendar |
丁丑年 (Fire Ox) 4334 or 4274 — to — 戊寅年 (Earth Tiger) 4335 or 4275 |
| Coptic calendar | 1354–1355 |
| Discordian calendar | 2804 |
| Ethiopian calendar | 1630–1631 |
| Hebrew calendar | 5398–5399 |
| Hindu calendars | |
| - Vikram Samvat | 1694–1695 |
| - Shaka Samvat | 1559–1560 |
| - Kali Yuga | 4738–4739 |
| Holocene calendar | 11638 |
| Igbo calendar | 638–639 |
| Iranian calendar | 1016–1017 |
| Islamic calendar | 1047–1048 |
| Japanese calendar |
Kan'ei 15 (寛永１５年) |
| Javanese calendar | 1559–1560 |
| Julian calendar | Gregorian minus 10 days |
| Korean calendar | 3971 |
| Minguo calendar | 274 before ROC 民前274年 |
| Nanakshahi calendar | 170 |
| Thai solar calendar | 2180–2181 |
1638 (MDCXXXVIII) was a common year starting on Friday (dominical letter C) of the Gregorian calendar and a common year starting on Monday (dominical letter G) of the Julian calendar, the 1638th year of the Common Era (CE) and Anno Domini (AD) designations, the 638th year of the 2nd millennium, the 38th year of the 17th century, and the 9th year of the 1630s decade. As of the start of 1638, the Gregorian calendar was 10 days ahead of the Julian calendar, which remained in localized use until 1923.
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