900

Millennium: 1st millennium
Centuries:
Decades:
Years:
900 in various calendars
Gregorian calendar900
CM
Ab urbe condita1653
Armenian calendar349
ԹՎ ՅԽԹ
Assyrian calendar5650
Balinese saka calendar821–822
Bengali calendar307
Berber calendar1850
Buddhist calendar1444
Burmese calendar262
Byzantine calendar6408–6409
Chinese calendar己未年 (Earth Goat)
3597 or 3390
    — to —
庚申年 (Metal Monkey)
3598 or 3391
Coptic calendar616–617
Discordian calendar2066
Ethiopian calendar892–893
Hebrew calendar4660–4661
Hindu calendars
 - Vikram Samvat956–957
 - Shaka Samvat821–822
 - Kali Yuga4000–4001
Holocene calendar10900
Iranian calendar278–279
Islamic calendar286–288
Japanese calendarShōtai 3
(昌泰3年)
Javanese calendar798–799
Julian calendar900
CM
Korean calendar3233
Minguo calendar1012 before ROC
民前1012年
Nanakshahi calendar−568
Seleucid era1211/1212 AG
Thai solar calendar1442–1443
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
The Earth's Eastern Hemisphere (c. 900)
Gunnbjörn discovers Greenland (c. 900)

Year 900 (CM) was a leap year starting on Tuesday (link will display the full calendar) of the Julian calendar.