1288

1288 in various 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); 3985 or 3778; — to —; 戊子年 (Earth Rat); 3986 or 3779
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	阴火猪年; (female Fire-Pig); 1414 or 1033 or 261; — to —; 阳土鼠年; (male Earth-Rat); 1415 or 1034 or 262

Millennium:	2nd millennium
Centuries:	12th century; 13th century ; 14th century;
Decades:	1260s; 1270s; 1280s ; 1290s; 1300s;
Years:	1285; 1286; 1287; 1288 ; 1289; 1290; 1291;

Year 1288 (MCCLXXXVIII) was a leap year starting on Thursday (link will display the full calendar) of the Julian calendar.

Events

April – Battle of Bạch Đằng: Đại Việt (Vietnamese) general Trần Hưng Đạo sinks the fleet of an invading Mongol army of the Yuan Dynasty by placing steel-tipped bamboo stakes in the Bach Dang River near Ha Long Bay.
The Japanese era Koan ends, and the Shōō era begins.
Japan: Prince Subaru conquers the provinces of Gunma and Tochigi.
Li Ting leads troops and portable cannon of Kublai Khan against the rebel prince Nayan at Banlachengzi in Manchuria.^[1]

January 20 – Newcastle Emlyn Castle in Wales is recaptured by English forces, bringing Rhys ap Maredudd's revolt to an end.
June 5 – Battle of Worringen: John I of Brabant defeats the duchy of Guelders in 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 is built.
Work is begun on the construction of Mob Quad in Merton College, Oxford.

June 16 – The bishop of Västerås buys 1/8 of the Stora Kopparberg copper mine in Falun, Sweden.
The Flemish city of Ghent seeks rights to start redeeming its already issued annuities. It is a clear indication of financial difficulty and maybe an early sign of the crisis of the 13th century.^[2]

The oldest known bronze handgun in the world is dated to this year, a Chinese gun found in Acheng District that was once used to suppress the rebellion of the Christian Mongol Prince Nayan in 1287–1288.

^ History of Yuan.
^ Munro, John H. (2003). "The Medieval Origins of the Financial Revolution". The International History Review. 15 (3): 506–562.

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