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1075 in various calendars
Gregorian calendar	1075; MLXXV
Ab urbe condita	1828
Armenian calendar	524; ԹՎ ՇԻԴ
Assyrian calendar	5825
Balinese saka calendar	996–997
Bengali calendar	482
Berber calendar	2025
English Regnal year	9 Will. 1 – 10 Will. 1
Buddhist calendar	1619
Burmese calendar	437
Byzantine calendar	6583–6584
Chinese calendar	甲寅年 (Wood Tiger); 3772 or 3565; — to —; 乙卯年 (Wood Rabbit); 3773 or 3566
Coptic calendar	791–792
Discordian calendar	2241
Ethiopian calendar	1067–1068
Hebrew calendar	4835–4836
Hindu calendars
- Vikram Samvat	1131–1132
- Shaka Samvat	996–997
- Kali Yuga	4175–4176
Holocene calendar	11075
Igbo calendar	75–76
Iranian calendar	453–454
Islamic calendar	467–468
Japanese calendar	Jōhō 2; (承保２年)
Javanese calendar	979–980
Julian calendar	1075; MLXXV
Korean calendar	3408
Minguo calendar	837 before ROC; 民前837年
Nanakshahi calendar	−393
Seleucid era	1386/1387 AG
Thai solar calendar	1617–1618
Tibetan calendar	阳木虎年; (male Wood-Tiger); 1201 or 820 or 48; — to —; 阴木兔年; (female Wood-Rabbit); 1202 or 821 or 49

Millennium:	2nd millennium
Centuries:	10th century; 11th century ; 12th century;
Decades:	1050s; 1060s; 1070s ; 1080s; 1090s;
Years:	1072; 1073; 1074; 1075 ; 1076; 1077; 1078;

Year 1075 (MLXXV) was a common year starting on Thursday (link will display the full calendar) of the Julian calendar.

Events

The future Emperor Alexios Komnenos captures the Norman rebel Roussel de Bailleul in Amaseia. Roussel had established a principality in eastern Anatolia in 1073 after rebelling against Emperor Michael VII Doukas, basing his power on his western mercenaries and local support in exchange for protection against invading Turkmen.^[1]

June 9 – First Battle of Langensalza: Emperor Henry IV defeats the Saxon nobles on the River Unstrut near Langensalza in Thuringia (modern Germany). He subjugates Saxony, and immediately tries to reassert his rights as the sovereign of northern Italy.
Anund Gårdske is deposed as king of Svealand (also called Sweden proper). King Håkan the Red of Götaland proclaims himself ruler of all Sweden.

Revolt of the Earls: The Earls Ralph de Gael, Roger de Breteuil and Waltheof, begin a revolt against King William I (the Conqueror) in the last serious act of resistance to the Norman Conquest.
Roger de Breteuil is brought before the Great Council. He is deprived of his lands and sentenced to perpetual imprisonment. Ralph de Gael and Waltheof are charged as co-conspirators.
August 25 – Council of London: Archbishop Lanfranc instigates the movement of English bishoprics. One of these is the bishopric of Sherborne and Wilton which is moved to Old Sarum.

Summer – Shen Kuo, Chinese polymath scientist and statesman, solves a border dispute with the Liao dynasty by dredging up old diplomatic records. He refutes Emperor Dao Zong's bluffs point for point during a meeting at Mt. Yongan (near modern-day Pingquan), reestablishing the rightful borders of the Song dynasty.
Vietnamese forces under General Lý Thường Kiệt defend Vietnam against a Chinese invasion.
The Liao dynasty version of the Buddhist Tripiṭaka is completed (approximate date).

February – Pope Gregory VII holds a council in the Lateran Palace at Rome. He publishes a decree against laymen investiture (an act which will later cause the Investiture Controversy).
April – The Dictatus papae (a compilation of 27 statements of powers) are included in the registry of Gregory VII, in which he asserts papal authority over earthly as well as spiritual rulers.
December 8 – Gregory VII writes a letter of reprimand to Henry IV. He accuses him of breaching his word and continued support of excommunicated councilors.
December 25 – Gregory VII is kidnapped in the church during Christmas night in Rome and briefly imprisoned by the Roman nobleman Cencio I Frangipane.

^ Alexander Daniel Beihammer (2017). Byzantium and the Emergence of Muslim-Turkish Anatolia, Ca. 1040-1130, p. 210-212.
^ "Orderic Vitalis | Norman history". Encyclopædia Britannica. Retrieved July 28, 2018.
^ "Lothar II (or III) | Holy Roman emperor". Encyclopædia Britannica. Retrieved July 28, 2018.