Wikipedia:
644
| Centuries: | 6th century · 7th century · 8th century |
| Decades: | 610s 620s 630s 640s 650s 660s 670s |
| Years: | 641 642 643 644 645 646 647 |
| 644 by topic | |
| Politics | |
| State leaders - Sovereign states | |
| Birth and death categories | |
| Births - Deaths | |
| Establishments and disestablishments categories | |
| Establishments - Disestablishments | |
| Gregorian calendar | 644 DCXLIV |
| Ab urbe condita | 1397 |
| Armenian calendar | 93 ԹՎ ՂԳ |
| Bahá'í calendar | -1200 – -1199 |
| Buddhist calendar | 1188 |
| Chinese calendar | 3280/3340-11-16 (癸卯年十一月十六日) — to —
3281/3341-11-27(甲辰年十一月廿七日) |
| Coptic calendar | 360 – 361 |
| Ethiopian calendar | 636 – 637 |
| Hebrew calendar | 4404 – 4405 |
| Hindu calendars | |
| - Vikram Samvat | 699 – 700 |
| - Shaka Samvat | 566 – 567 |
| - Kali Yuga | 3745 – 3746 |
| Holocene calendar | 10644 |
| Iranian calendar | 22 – 23 |
| Islamic calendar | 23 – 24 |
| Japanese calendar | |
| - Imperial Year | Kōki 1304 (皇紀1304年) |
| Julian calendar | 689 |
| Korean calendar | 2977 |
| Thai solar calendar | 1187 |
Events
By Place
Asia
- The Tang dynasty of China begins invasion of Goguryo.
- Uthman starts to rule.
Births
Deaths
- Paulinus of York, bishop of Northumbria
- November — Umar, second caliph of Islam, by assassinationmap-bms:644bpy:মারি ৬৪৪new:६४४ksh:Joohr 644
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