| Centuries: | 6th century · 7th century · 8th century |
| Decades: | 600s 610s 620s 630s 640s 650s 660s |
| Years: | 632 633 634 635 636 637 638 |
| 635 by topic | |
| Politics | |
| State leaders – Sovereign states | |
| Birth and death categories | |
| Births – Deaths | |
| Establishment and disestablishment categories | |
| Establishments – Disestablishments | |
| Gregorian calendar | 635 DCXXXV |
| Ab urbe condita | 1388 |
| Armenian calendar | 84 ԹՎ ՁԴ |
| Bahá'í calendar | -1209 – -1208 |
| Bengali calendar | 42 |
| Berber calendar | 1585 |
| Buddhist calendar | 1179 |
| Burmese calendar | -3 |
| Byzantine calendar | 6143 – 6144 |
| Chinese calendar | 甲午年十二月初七日 (3271/3331-12-7) — to —
乙未年十一月十七日(3272/3332-11-17) |
| Coptic calendar | 351 – 352 |
| Ethiopian calendar | 627 – 628 |
| Hebrew calendar | 4395 – 4396 |
| Hindu calendars | |
| - Bikram Samwat | 691 – 692 |
| - Shaka Samvat | 557 – 558 |
| - Kali Yuga | 3736 – 3737 |
| Holocene calendar | 10635 |
| Iranian calendar | 13 – 14 |
| Islamic calendar | 13 – 14 |
| Japanese calendar | |
| Korean calendar | 2968 |
| Thai solar calendar | 1178 |