| 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 | ས་མོ་ལུག་ལོ་ (female Earth-Sheep) 1026 or 645 or −127 — to — ལྕགས་ཕོ་སྤྲེ་ལོ་ (male Iron-Monkey) 1027 or 646 or −126 |
Year 900 ( CM ) was a leap year starting on Tuesday of the Julian calendar. It was the 900th year of the Common Era (CE) and Anno Domini (AD) designations, the 900th year of the 1st millennium, the 100th and last year of the 9th century, and the first year of the 900s decade.
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