|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|
|State leaders – Sovereign states|
|Birth and death categories|
|Births – Deaths|
|Establishment and disestablishment categories|
|Establishments – Disestablishments|
|Ab urbe condita||1375|
|Bahá'í calendar||-1222 – -1221|
|English Regnal year||N/A|
|Chinese calendar||辛巳年 (Metal Snake)
3318 or 3258
— to —
壬午年 (Water Horse)
3319 or 3259
|- Vikram Samvat||678–679|
|- Shaka Samvat||544–545|
|- Kali Yuga||3723–3724|
|Igbo calendar||-378 – -377|
|Minguo calendar||1290 before ROC
|Thai solar calendar||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.
- Byzantine–Sassanid 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 pose to his Balkan domains by the Avars and puts the Byzantine army into winter quarters in Pontus.
- July 16 – Muhammad emigrates his community (the movement is called the Hijra) to Medina, a large agricultural oasis in Saudi Arabia. There he formally establish the Muslim community, beginning the Muslim calendar in that year, renaming it "Year One" of the Anno Hegirae (AH). He continues to preach and recite the words which Allah reveals to him. It is these passages, together with the earlier revelations at Mecca, which are written down in the Arabic script by his followers and are collected to become the Qur'an - word (often transliterated as Koran). Muhammad becomes a religious, political and even military leader.
- Xuanzang is fully ordained as a Buddhist monk at the age of 20.
- Abdullah ibn Aamir, Arab general (d. 678)
- Al-Mukhtar, Islamic revolutionary (d. 687)
- Bavo, Frankish nobleman and saint (d. 659)
- Mezezius, Byzantine usurper (d. 669)
- Uqba ibn Nafi, Arab general (d. 683)
- Xue Yuanchao, official of the Tang Dynasty (d. 683)
- Andronicus, Coptic Orthodox Patriarch of Alexandria
- John of Biclaro, Visigoth chronicler (approximate date)
- Li Zitong, rebel leader during the Sui Dynasty
- Lin Shihong, rebel leader during the Sui Dynasty
- Liu Wuzhou, rebel leader during the Sui Dynasty
- April 8 – Shōtoku, prince and regent of Japan (b. 572)
Hid three days in the Jabal Thawr south of Mecca. from Thursday Sep 9 to Sunday Sep 12, 622 A.D/ 26 Safar- 1 Rabi-ul- Awwal, 1 AH
- Quba Mosque Muhammad arrived at Quba' near to Medina on Monday, September 20, 622 A.D/ 8 Rabi-ul-Awwal, 1 AH.
- Kaegi 2003, p. 116
- Sardar, Ziauddin (24 June 1982). "The astronomy of Ramadan". New Scientist 94 (1311): 854. ISSN 0262-4079.
- 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.). Encyclopædia Britannica, Inc. 1991. p. 765. ISBN 978-0-85229-529-8.