1284 (MCCLXXXIV) was a leap year starting on Saturday of the Julian calendar, the 1284th year of the Common Era (CE) and Anno Domini (AD) designations, the 284th year of the 2nd millennium, the 84th year of the 13th century, and the 5th year of the 1280s decade. As of the start of 1284, the Gregorian calendar was 7 days ahead of the Julian calendar, which was the dominant calendar of the time.

Millennium: 2nd millennium
Centuries: 12th century13th century14th century
Decades: 1250s  1260s  1270s  – 1280s –  1290s  1300s  1310s
Years: 1281 1282 128312841285 1286 1287
1284 in other calendars
Gregorian calendar1284
MCCLXXXIV
Ab urbe condita2037
Armenian calendar733
ԹՎ ՉԼԳ
Assyrian calendar6034
Balinese saka calendar1205–1206
Bengali calendar691
Berber calendar2234
English Regnal year12 Edw. 1 – 13 Edw. 1
Buddhist calendar1828
Burmese calendar646
Byzantine calendar6792–6793
Chinese calendar癸未(Water Goat)
3980 or 3920
    — to —
甲申年 (Wood Monkey)
3981 or 3921
Coptic calendar1000–1001
Discordian calendar2450
Ethiopian calendar1276–1277
Hebrew calendar5044–5045
Hindu calendars
 - Vikram Samvat1340–1341
 - Shaka Samvat1205–1206
 - Kali Yuga4384–4385
Holocene calendar11284
Igbo calendar284–285
Iranian calendar662–663
Islamic calendar682–683
Japanese calendarKōan 7
(弘安7年)
Javanese calendar1194–1195
Julian calendar1284
MCCLXXXIV
Korean calendar3617
Minguo calendar628 before ROC
民前628年
Nanakshahi calendar−184
Thai solar calendar1826–1827
Tibetan calendar阴水羊年
(female Water-Goat)
1410 or 1029 or 257
    — to —
阳木猴年
(male Wood-Monkey)
1411 or 1030 or 258

Births change