1285

1285 (MCCLXXXV) was a common year starting on Monday of the Julian calendar, the 1285th year of the Common Era (CE) and Anno Domini (AD) designations, the 285th year of the 2nd millennium, the 85th year of the 13th century, and the 6th year of the 1280s decade. As of the start of 1285, the Gregorian calendar was 7 days ahead of the Julian calendar, which was the dominant calendar of the time.

Millennium:	2nd millennium
Centuries:	12th century – 13th century – 14th century
Decades:	1250s  1260s  1270s  – 1280s –  1290s  1300s  1310s
Years:	1282 1283 1284 – 1285 – 1286 1287 1288

1285 in other calendars

Gregorian calendar	1285 MCCLXXXV
Ab urbe condita	2038
Armenian calendar	734 ԹՎ ՉԼԴ
Assyrian calendar	6035
Balinese saka calendar	1206–1207
Bengali calendar	692
Berber calendar	2235
English Regnal year	13 Edw. 1 – 14 Edw. 1
Buddhist calendar	1829
Burmese calendar	647
Byzantine calendar	6793–6794
Chinese calendar	甲申年 (Wood Monkey) 3981 or 3921     — to — 乙酉年 (Wood Rooster) 3982 or 3922
Coptic calendar	1001–1002
Discordian calendar	2451
Ethiopian calendar	1277–1278
Hebrew calendar	5045–5046
Hindu calendars
- Vikram Samvat	1341–1342
- Shaka Samvat	1206–1207
- Kali Yuga	4385–4386
Holocene calendar	11285
Igbo calendar	285–286
Iranian calendar	663–664
Islamic calendar	683–684
Japanese calendar	Kōan 8 (弘安８年)
Javanese calendar	1195–1196
Julian calendar	1285 MCCLXXXV
Korean calendar	3618
Minguo calendar	627 before ROC 民前627年
Nanakshahi calendar	−183
Thai solar calendar	1827–1828
Tibetan calendar	阳木猴年 (male Wood-Monkey) 1411 or 1030 or 258     — to — 阴木鸡年 (female Wood-Rooster) 1412 or 1031 or 259

Events

• January 6 – Archbishop Jakub Świnka orders all priests subject to his bishopry in Poland to deliver sermons in Polish rather than German, thus further unifying the Catholic Church in Poland and fostering a national identity.
• April 25 – Mamluk sultan Qalawun begins a siege of the Crusader fortress of Margat (in present-day Syria), a major stronghold of the Knights Hospitaller thought to be impregnable; he captures the fortress a month later.
• September 4 – Roger of Lauria defeats King Philip III of France in a naval battle off of Barcelona.
• The writ Circumspecte Agatis, issued by King Edward I of England, defines the jurisdictions of church and state in England, thereby limiting the church's judicial powers to ecclesiastical cases only.
• The Second statute of Westminster is passed in England, reforming various laws; it includes the famous clause de donis conditionalibus, considered one of the fundamental institutes of medieval law in England.
• The English romantic poem The Lay of Havelok the Dane is written (approximate date).
• Tran Hung Dao leads Vietnamese forces in victory over an invading Yuan dynasty Mongol army.