870 (DCCCLXX) was a common year starting on Sunday of the Julian calendar, the 870th year of the Common Era (CE) and Anno Domini (AD) designations, the 870th year of the 1st millennium, the 70th year of the 9th century, and the 1st year of the 870s decade. As of the start of 870, the Gregorian calendar was 4 days ahead of the Julian calendar, which was the dominant calendar of the time.

Millennium: 1st millennium
Centuries: 8th century9th century10th century
Decades: 840s  850s  860s  – 870s –  880s  890s  900s
Years: 867 868 869870871 872 873
870 in other calendars
Gregorian calendar870
DCCCLXX
Ab urbe condita1623
Armenian calendar319
ԹՎ ՅԺԹ
Assyrian calendar5620
Balinese saka calendar791–792
Bengali calendar277
Berber calendar1820
Buddhist calendar1414
Burmese calendar232
Byzantine calendar6378–6379
Chinese calendar己丑(Earth Ox)
3566 or 3506
    — to —
庚寅年 (Metal Tiger)
3567 or 3507
Coptic calendar586–587
Discordian calendar2036
Ethiopian calendar862–863
Hebrew calendar4630–4631
Hindu calendars
 - Vikram Samvat926–927
 - Shaka Samvat791–792
 - Kali Yuga3970–3971
Holocene calendar10870
Iranian calendar248–249
Islamic calendar256–257
Japanese calendarJōgan 12
(貞観12年)
Javanese calendar767–768
Julian calendar870
DCCCLXX
Korean calendar3203
Minguo calendar1042 before ROC
民前1042年
Nanakshahi calendar−598
Seleucid era1181/1182 AG
Thai solar calendar1412–1413
Tibetan calendar阴土牛年
(female Earth-Ox)
996 or 615 or −157
    — to —
阳金虎年
(male Iron-Tiger)
997 or 616 or −156

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