| Centuries: | 6th century · 7th century · 8th century |
| Decades: | 610s 620s 630s 640s 650s 660s 670s |
| Years: | 638 639 640 641 642 643 644 |
| 641 by topic | |
| Politics | |
| State leaders – Sovereign states | |
| Birth and death categories | |
| Births – Deaths | |
| Establishment and disestablishment categories | |
| Establishments – Disestablishments | |
| Gregorian calendar | 641 DCXLI |
| Ab urbe condita | 1394 |
| Armenian calendar | 90 ԹՎ Ղ |
| Bahá'í calendar | -1203 – -1202 |
| Bengali calendar | 48 |
| Berber calendar | 1591 |
| Buddhist calendar | 1185 |
| Burmese calendar | 3 |
| Byzantine calendar | 6149 – 6150 |
| Chinese calendar | 庚子年十一月十四日 (3277/3337-11-14) — to —
辛丑年十一月廿四日(3278/3338-11-24) |
| Coptic calendar | 357 – 358 |
| Ethiopian calendar | 633 – 634 |
| Hebrew calendar | 4401 – 4402 |
| Hindu calendars | |
| - Bikram Samwat | 697 – 698 |
| - Shaka Samvat | 563 – 564 |
| - Kali Yuga | 3742 – 3743 |
| Holocene calendar | 10641 |
| Iranian calendar | 19 – 20 |
| Islamic calendar | 20 – 21 |
| Japanese calendar | |
| Korean calendar | 2974 |
| Thai solar calendar | 1184 |