622

Millennium:	1st millennium
Centuries:	6th century · 7th century · 8th century
Decades:	590s · 600s · 610s · 620s · 630s · 640s · 650s
Years:	619 · 620 · 621 · 622 · 623 · 624 · 625

622 by topic
Politics
State leaders – Sovereign states
Birth and death categories
Births – Deaths
Establishment and disestablishment categories
Establishments – Disestablishments

622 in various calendars
Gregorian calendar	622 DCXXII
Ab urbe condita	1375
Armenian calendar	71 ԹՎ ՀԱ
Assyrian calendar	5372
Bengali calendar	29
Berber calendar	1572
Buddhist calendar	1166
Burmese calendar	−16
Byzantine calendar	6130–6131
Chinese calendar	辛巳年 (Metal Snake) 3318 or 3258 — to — 壬午年 (Water Horse) 3319 or 3259
Coptic calendar	338–339
Discordian calendar	1788
Ethiopian calendar	614–615
Hebrew calendar	4382–4383
Hindu calendars
- Vikram Samvat	678–679
- Shaka Samvat	543–544
- Kali Yuga	3722–3723
Holocene calendar	10622
Iranian calendar	0–1
Islamic calendar	0–1
Japanese calendar	N/A
Javanese calendar	512–513
Julian calendar	622 DCXXII
Korean calendar	2955
Minguo calendar	1290 before ROC 民前1290年
Nanakshahi calendar	−846
Seleucid era	933/934 AG
Thai solar calendar	1164–1165

Wikimedia Commons has media related to 622.

Year 622 (DCXXII) was a common year starting on Friday (link will display the full calendar) of the Julian calendar. The denomination 622 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.

Events

Byzantine–Sasanian War: Emperor Heraclius sails from Constantinople with an expeditionary force (probably 50,000 men), and starts a counter-offensive against the Persian Empire (his young son, Constantine III, is left behind as regent under the charge of Sergius I, patriarch of Constantinople, and patrician Bonus). He lands a few days later at the junction of Cilicia and Syria, near Alexandretta and ancient Issus.
Battle of Issus: Heraclius defeats the Persian forces under Shahrbaraz in Cappadocia. He recaptures Anatolia, but returns to Constantinople to deal with the threat posed to his Balkan domains by the Avars, and puts the Byzantine army into winter quarters in Pontus.^[1]

The Western Turks conquer the Oxus valley and cooperate with Heraclius against Persia, taking Khorasan (modern Afghanistan).

September 9^[2] or June 17^[3] – The Islamic prophet Muhammad, after being warned of a plot to assassinate him, secretly leaves his home in Mecca to make the Hegira (emigrate) to Yathrib (later renamed by him Medina), along with his companion Abu Bakr. They take refuge in the Cave of Thawr south of Mecca for three days, departing on September 13 or June 21.
September 20^[2] or June 28^[3] – Muhammad does not enter Yathrib directly, but stops at its outlying environs of Quba. He establishes the Quba Mosque here, the first mosque of Islam. On July 2 (or September 24) he makes his first visit to Yathrib for Friday prayers.
October 4^[2] or July 13 – After a fourteen days' stay in Quba, Muhammad finally moves from Quba to Yathrib, and is greeted cordially by its people. Here he drafts the Constitution of Medina, an agreement between the various Muslim, Jewish, Christian and pagan tribal communities in the city, forming the basis of a multi-religious Islamic state, and begins construction of the Al-Masjid an-Nabawi Mosque. Later during the caliphate of Umar in 638, the lunar year during which the emigration to Medina occurred (Friday 16 July 622 – 4 July 623) is designated "Year One" of the new Hijri year (Anno Hegirae – AH).
Xuanzang is fully ordained as a Buddhist monk at the age of 20.^[4]

↑ Kaegi 2003, p. 116
1 2 3 Shamsi, F. A. (1984). "The Date of Hijrah". Islamic Studies. 23: 189–224, 289–323.
1 2 Shaikh, Fazlur Rehman (2001). Chronology of Prophetic Events. London: Ta-Ha Publishers. pp. 51–52.
↑ Howgego, Raymond John (2003). Encyclopedia of Exploration to 1800. Hordern House. p. 522. ISBN 978-1-875567-36-2.
↑ Illustrated Dictionary of the Muslim World. Marshall Cavendish. 2010. pp. 122–123. ISBN 978-0-7614-7929-1.
↑ DeBlasi, Anthony (2002). Reform in the balance: the defense of literary culture in mid-Tang China. SUNY Press. p. 170. ISBN 978-0-7914-5436-7.
↑ Holtzclaw, R. Fulton (1980). The Saints Go Marching In. Keeble Press. p. 24.
↑ Woo, X. L. (2008). "622#v=onepage&q&f=false Empress Wu the Great: Tang Dynasty China. Algora Publishing. p. 19. ISBN 978-0-87586-660-4.
↑ The New Encyclopædia Britannica: Micropædia (15th ed.). 1991. p. 765. ISBN 978-0-85229-529-8.

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