900
| Years |
|---|
| Millennium |
| 1st millennium |
| Centuries |
| Decades |
| Years |
| 900 by topic |
|---|
| Leaders |
| Categories |
|
| Gregorian calendar | 900 CM |
| Ab urbe condita | 1653 |
| Armenian calendar | 349 ԹՎ ՅԽԹ |
| Assyrian calendar | 5650 |
| Balinese saka calendar | 821–822 |
| Bengali calendar | 306–307 |
| Berber calendar | 1850 |
| Buddhist calendar | 1444 |
| Burmese calendar | 262 |
| Byzantine calendar | 6408–6409 |
| Chinese calendar | 己未年 (Earth Goat) 3597 or 3390 — to — 庚申年 (Metal Monkey) 3598 or 3391 |
| Coptic calendar | 616–617 |
| Discordian calendar | 2066 |
| Ethiopian calendar | 892–893 |
| Hebrew calendar | 4660–4661 |
| Hindu calendars | |
| - Vikram Samvat | 956–957 |
| - Shaka Samvat | 821–822 |
| - Kali Yuga | 4000–4001 |
| Holocene calendar | 10900 |
| Iranian calendar | 278–279 |
| Islamic calendar | 286–288 |
| Japanese calendar | Shōtai 3 (昌泰３年) |
| Javanese calendar | 798–799 |
| Julian calendar | 900 CM |
| Korean calendar | 3233 |
| Minguo calendar | 1012 before ROC 民前1012年 |
| Nanakshahi calendar | −568 |
| Seleucid era | 1211/1212 AG |
| Thai solar calendar | 1442–1443 |
| Tibetan calendar | 阴土羊年 (female Earth-Goat) 1026 or 645 or −127 — to — 阳金猴年 (male Iron-Monkey) 1027 or 646 or −126 |
Year 900 (CM) was a leap year starting on Tuesday of the Julian calendar.