1288

1288 (MCCLXXXVIII) was a leap year starting on Thursday of the Julian calendar, the 1288th year of the Common Era (CE) and Anno Domini (AD) designations, the 288th year of the 2nd millennium, the 88th year of the 13th century, and the 9th year of the 1280s decade. As of the start of 1288, the Gregorian calendar was 7 days ahead of the Julian calendar, which was the dominant calendar of the time.

1288 in other calendars

Gregorian calendar	1288 MCCLXXXVIII
Ab urbe condita	2041
Armenian calendar	737 ԹՎ ՉԼԷ
Assyrian calendar	6038
Balinese saka calendar	1209–1210
Bengali calendar	695
Berber calendar	2238
English Regnal year	16 Edw. 1 – 17 Edw. 1
Buddhist calendar	1832
Burmese calendar	650
Byzantine calendar	6796–6797
Chinese calendar	丁亥年 (Fire Pig) 3984 or 3924     — to — 戊子年 (Earth Rat) 3985 or 3925
Coptic calendar	1004–1005
Discordian calendar	2454
Ethiopian calendar	1280–1281
Hebrew calendar	5048–5049
Hindu calendars
- Vikram Samvat	1344–1345
- Shaka Samvat	1209–1210
- Kali Yuga	4388–4389
Holocene calendar	11288
Igbo calendar	288–289
Iranian calendar	666–667
Islamic calendar	686–687
Japanese calendar	Kōan 11 / Shōō 1 (正応元年)
Javanese calendar	1198–1199
Julian calendar	1288 MCCLXXXVIII
Korean calendar	3621
Minguo calendar	624 before ROC 民前624年
Nanakshahi calendar	−180
Thai solar calendar	1830–1831
Tibetan calendar	མེ་མོ་ཕག་ལོ་ (female Fire-Boar) 1414 or 1033 or 261     — to — ས་ཕོ་བྱི་བ་ལོ་ (male Earth-Rat) 1415 or 1034 or 262

Events

• June 5 – John I of Brabant defeats the duchy of Guelders in the Battle of Worringen — one of the largest battles in Europe of the Middle Ages — thus winning possession of the duchy of Limburg. The battle also liberates the city of Cologne from rule by the Archbishopric of Cologne; it had previously been one of the major ecclesiastical principalities of the Holy Roman Empire.
• August 8 – Pope Nicholas IV proclaims a crusade against King Ladislaus IV of Hungary, who had lost credibility by favoring his semi-pagan Cuman subjects and in general refusing to conform to the social standards of western Europe.
• The Scots Parliament creates a law allowing women to propose marriage to men during leap years; men who refuse such proposals are required to pay a fine to the spurned bride-to-be.
• The oldest surviving bell in the clocks atop the dome of St. Peter's Basilica in Rome dates to 1288.
• Vietnamese general Tran Hung Dao sinks the entire fleet of an invading Yuan dynasty Mongol army by placing steel-tipped bamboo stakes in the Bach Dang River, near Halong Bay.
• The Japanese era Koan ends, and the Shōō era begins.