|708 by topic|
|Ab urbe condita||1461|
|Balinese saka calendar||629–630|
|Chinese calendar||丁未年 (Fire Goat)|
3404 or 3344
— to —
戊申年 (Earth Monkey)
3405 or 3345
|- Vikram Samvat||764–765|
|- Shaka Samvat||629–630|
|- Kali Yuga||3808–3809|
|Japanese calendar||Keiun 5 / Wadō 1|
|Minguo calendar||1204 before ROC|
|Seleucid era||1019/1020 AG|
|Thai solar calendar||1250–1251|
834 or 453 or −319
— to —
835 or 454 or −318
Year 708 (DCCVIII) was a leap year starting on Sunday (link will display the full calendar) of the Julian calendar. The denomination 708 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.
- Arab–Byzantine War: The Umayyads under Maslamah ibn Abd al-Malik capture and sack the Byzantine city of Tyana (Cappadocia) after a prolonged siege, and following a victory over a Byzantine relief army. Maslamah also leads another expedition in the summer, Maslamah raids and conquers Amorium (modern Turkey).
- Battle of Anchialus: A Byzantine expeditionary force under Emperor Justinian II is defeated near the seaside city of Anchialus, on the Black Sea Coast. The Byzantines are overwhelmed by a surprise attack of Bulgarian cavalry, led by Tervel. Justinian manages to reach the fortress, and escapes to Constantinople on a ship.
- Nazaktar Khan, a Turk Shahi prince in alliance with the Tibetan Empire, captures Bactria from the Umayyads.
- August 29 – Copper coins are minted in Japan for the first time (Traditional Japanese date: August 10, 708).
- Tea drinking gains popularity among the Chinese. It is also valued for its alleged medicinal values (approximate date).
- January 15 – Pope Sisinnius succeeds Pope John VII as the 87th pope.
- March 25 – Pope Constantine I succeeds Pope Sisinnius as the 88th pope.
- Island Mont Tombe is dedicated to Michael and renamed Mont Saint-Michel.
- Theudoald, mayor of the palace of Austrasia (or 707)
- Yuthog Yontan Gonpo, Tibetan high priest (lama) (d. 833)
- February 4 – Sisinnius, pope of the Catholic Church
- June 5 – Jacob of Edessa, Syriac writer
- Abd-Allah ibn Ibadh, Muslim jurist and imam
- Drogo, duke of Champagne (b. 670)