624

Year 624 (DCXXIV) was a leap year starting on Sunday (link will display the full calendar) of the Julian calendar. The denomination 624 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.

• January 26 – (29 Rajab 2 AH) The Raid on Nakhla, the first successful raid the Muslims of Medina, against the Quraysh tribe in Mecca, is carried out by Abd Allah ibn Jahsh, who leads the plunder of a caravan of supplies.
• February 11 – While praying in the Masjid al-QiblatayninMedina, the Prophet Muhammad receives revelations from God on the qibla, the direction of prayer, that he should be facing Mecca rather than Jerusalem during prayer, beginning an Islamic tradition.^[1]
• February – Chinese General Li Daliang leads an army to retake the Yu prefecture, near Xuancheng in what is now the Anhui province, from the rebel leader Fu Gongshi.^[2]
• March 13 – (17 Ramadah 2 AH) The Battle of Badr takes place in what is now Saudi Arabia as the Prophet Muhammad and some 300 of his followers from Medina surprise a reinforced Meccan caravanatBadr (modern-day Saudi Arabia) returning from Syria, and defeat about 1,000 Quraysh from Mecca. After having heard that clan leader Abu Sufyan is escorting a rich trade caravan, Muhammad has the wells along its route (southwest of Medina) filled with sand in order to lure him into battle.
• March 25 – Heraclius, Emperor of Byzantium, departs from his capital at Constantinople (now Istanbul in Turkey) with his wife, the Empress Martina, and two of his children, and does not return for more than four years.
• April 9 – (15 Shawwal 2 AH) The Siege of Banu Qaynuqa is started by the Muslims in what is now Yathrib in Saudi Arabia, four days after Ghalib ibn Abd Allah al-Laythi is dispatched by the prophet Muhammad.^[3]
• April 15 – Emperor Haraclius celebrates Easter at Nicomedia (now İzmit) then travels to Caesarea (now Kayseri), proceeding during April to Theodosiopolis. He leads troops into Armenia and sacks its capital, Dvin.^[4]
• April 20 – (27th day of the 3rd month of the 6th year of the Wu'de era) Du Fuwei, a Chinese prince who rebelled against Sui dynasty China and then was rewarded with the title "Prince of Wu" by Emperor Gaozu of Tang, dies suddenly of poisoning, under suspicion that he has been ordered killed by the Emperor.^[5]
• April 20 – Heraclius invades the Sassanid Empire (now Iran).^[6]
• April 24 – St. Justus is appointed as the new Archbishop of CanterburybyPope Boniface V upon the death of Archbishop Mellitus.^[7], receiving the pallium — symbol of the jurisdiction entrusted to archbishops. He oversees the dispatch of missionariestoNorthumbria in northern England to convert the Anglo-Saxons to Christianity.
• June 23 – While at Ganzak at what is now northwest Iran, the Sassanid Emperor Khosrow II (Chosroes) is informed by soldiers who had escaped capture that Emperor Heraclius of Byzantium is preparing a surprise attack. Khosrow dispatches an envoy to inform General Shahrbaraz to abandon a campaign in Asia Minor and to accompany him to face Heraclius.^[8]
• June – (Dhu al-Hijjah AH 2) The Invasion of Sawiq is carried out against the Muslims by the Quraysh leader, Abu Sufyan ibn Harb. ^[9]

• August 12 – The Army of the Eastern Turkic Khaganate, led by Illig Qaghan, clashes with the army of Tang dynasty China, led by Taizong, Prince of Qin and son of Emperor Gaozu, with fighting taking place west of Binzhou in what is now the Shandong province.^[10]
• August – Upon the death of Khunays ibn Hudhafa, a companion of the Prophet Muhammad, Khunays's widow Hafsa bint Umar becomes eligible to marry Muhammad.^[11]
• November 11 – (9th B'ak'tun, 9th K'atun,9th year, 12th month, 3rd day) In what is now Guatemala, a stele is carved to honor a victory in battle by Kʼinich Yoʼnal Ahk I, the Mayan ruler of Piedras Negras^[12]
• November –
  • Zayd ibn Haritha , the Sahabi and military commander for the prophet Muhammadis sent on an expedition to Dhat Irq near Mecca.^[13][14] He then carries out the Al-Qarada raid of a caravan of Meccan merchants after discovering their trade route and captures more that 100,000 dirhams worth of goods^[15]
• December 21 – A group of 1,000 Muslims from Mecca, led by Abu Sufyan ibn Harb, sets out from Mecca to capture Medina, defended by the Banu Khazraj tribe, led by Abd Allah ibn Ubayy. The two forces will fight combat three months later, on March 23, 625, at the Battle of Uhud.^[1]

• Byzantine–Sasanian War: Emperor Heraclius advances with an expeditionary force (40,000 men) along the Araxes River, destroying the fortress city of Dvin, capital of Armenia, and Nakhchivan (modern Azerbaijan). At Ganzak, Heraclius defeats the Persian army and destroys the famous fire templeatTakht-e Soleymān, an important Zoroastrian shrine.^[16] He winters his army in Caucasian Albania to gather forces for the next year.^[17]
• Winter – King Khosrow II withdraws most of his troops from Chalcedon (Anatolia); he assembles three armies to trap and destroy Heraclius' forces.^[18] The Persians go into winter quarters nearby, but Heraclius attacks them at Tigranakert (Western Armenia), routing the forces of the generals Shahin Vahmanzadegan and Shahraplakan. The Byzantines destroy their baggage train.

• The Visigoths under King Suintila recapture the Byzantine territories of Spania (Andalusia), after 70 years of occupation. Only the Balearic Islands stay a part of the Byzantine Empire.

• Eorpwald succeeds his father Rædwald, as king (bretwalda) of the independent Kingdom of East Anglia (approximate date).

• The Yiwen Leiju encyclopedia is completed during the Tang dynasty, by the Chinese calligrapher Ouyang Xun.

• February 17 – Wu Zetian, Empress of the Zhou dynasty (d. 705)
• May – Abd Allah ibn al-Zubayr, Arab sahabi (d. 692)
• Hasan ibn Ali, second Shia Imam and grandson of Muhammad (d. 670)
• Yazdegerd III, king of the Persian Empire (d. 651)
• Approximate date – Adomnán, Irish abbot and hagiographer (d. 704)^[19]

• March 17 – Amr ibn Hishām, Arab polytheist
• April 24 – Mellitus, Archbishop of Canterbury^[20]
• Abū Lahab, uncle of Muhammad (approximate date)
• Du Fuwei, rebel leader during the Sui dynasty (b. 598)
• Fu Gongshi, rebel leader during the Sui dynasty
• Gao Kaidao, rebel leader during the Sui dynasty
• Rædwald, king of East Anglia (approximate date)
• Ruqayyah, daughter of Muhammad (approximate date)
• Umayyah ibn Khalaf, clan leader of the Quraysh
• Utbah ibn Rabi'ah, clan leader of the Quraysh