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Millennium: 1st millennium
917 in various calendars
Gregorian calendar917
Ab urbe condita1670
Armenian calendar366
Assyrian calendar5667
Balinese saka calendar838–839
Bengali calendar324
Berber calendar1867
Buddhist calendar1461
Burmese calendar279
Byzantine calendar6425–6426
Chinese calendar丙子年 (Fire Rat)
3613 or 3553
    — to —
丁丑年 (Fire Ox)
3614 or 3554
Coptic calendar633–634
Discordian calendar2083
Ethiopian calendar909–910
Hebrew calendar4677–4678
Hindu calendars
 - Vikram Samvat973–974
 - Shaka Samvat838–839
 - Kali Yuga4017–4018
Holocene calendar10917
Iranian calendar295–296
Islamic calendar304–305
Japanese calendarEngi 17
Javanese calendar816–817
Julian calendar917
Korean calendar3250
Minguo calendar995 before ROC
Nanakshahi calendar−551
Seleucid era1228/1229 AG
Thai solar calendar1459–1460
Tibetan calendar阳火鼠年
(male Fire-Rat)
1043 or 662 or −110
    — to —
(female Fire-Ox)
1044 or 663 or −109
The Bulgarian victory at the Achelous River.

Year 917 (CMXVII) was a common year starting on Wednesday (link will display the full calendar) of the Julian calendar.


By place[edit]

Byzantine Empire[edit]

  • August 20Battle of Achelous: A Byzantine expeditionary force (62,000 men) under General Leo Phokas (the Elder) is routed by the Bulgarians at the Achelous River near the fortress of Anchialos (modern Pomorie) on the Black Sea coast. Phokas flees to Mesembria (modern Nesebar) and escapes by boarding a ship. Tsar Simeon I (the Great) becomes de facto ruler of the whole Balkan Peninsula, except the well-protected Byzantine capital of Constantinople and the Peloponnese.[1]
  • Fall – Battle of Katasyrtai: The Bulgarian army under Simeon I marches southwards to Constantinople. Leo Phokas, who survived at Anchelous, gathers the last Byzantine troops to intercept the Bulgarians before they reach the capital. The two armies meet near the village of Katasyrtai, just outside Constantinople. After a surprise night attack, the Byzantines are completely routed from the battlefield.[2]



Arabian Empire[edit]





  1. ^ Brain Todd Carey (2012). Road to Manzikert: Byzantine and Islamic Warfare 527–1071, pp. 78–81. ISBN 978-1-84884-215-1.
  2. ^ Lynda Garland (April 1, 2002). Byzantine Empresses: Woman and Power in Byzantium AD 527-1204. Routledge. p. 122. ISBN 9780203024812.
  3. ^ Fine, John V. A. Jr. (1991) [1983]. The Early Medieval Balkans: A Critical Survey from the Sixth to the Late Twelfth Century. Ann Arbor: University of Michigan Press. p. 150. ISBN 0-472-08149-7.
  4. ^ Walker, Ian W (2000). Mercia and the Making of England Sutton. ISBN 0-7509-2131-5.