311

311 (CCCXI) was a common year starting on Monday of the Julian calendar, the 311th year of the Common Era (CE) and Anno Domini (AD) designations, the 311th year of the 1st millennium, the 11th year of the 4th century, and the 2nd year of the 310s decade. As of the start of 311, the Gregorian calendar was 1 day ahead of the Julian calendar, which was the dominant calendar of the time.

Domitius Alexander

Millennium:	1st millennium
Centuries:	3rd century – 4th century – 5th century
Decades:	280s  290s  300s  – 310s –  320s  330s  340s
Years:	308 309 310 – 311 – 312 313 314

311 in other calendars

Gregorian calendar	311 CCCXI
Ab urbe condita	1064
Assyrian calendar	5061
Balinese saka calendar	232–233
Bengali calendar	−282
Berber calendar	1261
Buddhist calendar	855
Burmese calendar	−327
Byzantine calendar	5819–5820
Chinese calendar	庚午年 (Metal Horse) 3007 or 2947     — to — 辛未年 (Metal Goat) 3008 or 2948
Coptic calendar	27–28
Discordian calendar	1477
Ethiopian calendar	303–304
Hebrew calendar	4071–4072
Hindu calendars
- Vikram Samvat	367–368
- Shaka Samvat	232–233
- Kali Yuga	3411–3412
Holocene calendar	10311
Iranian calendar	311 BP – 310 BP
Islamic calendar	321 BH – 320 BH
Javanese calendar	191–192
Julian calendar	311 CCCXI
Korean calendar	2644
Minguo calendar	1601 before ROC 民前1601年
Nanakshahi calendar	−1157
Seleucid era	622/623 AG
Thai solar calendar	853–854
Tibetan calendar	阳金马年 (male Iron-Horse) 437 or 56 or −716     — to — 阴金羊年 (female Iron-Goat) 438 or 57 or −715

Events

By place

Roman Empire

• May 5 – Emperor Galerius says there is religious freedom . He issues his Edict of Toleration, ending persecution of Christians in the Eastern part of the Roman Empire. He dies at age 51.
• Maximinus II divides the Eastern Empire. He starts to persecute Christians again.
• Maxentius, Roman usurper, takes the African provinces from Domitius Alexander.
• Maxentius builds the Circus of Maxentius near the Via Appia.
• December 3 – Diocletianus dies in Split, Croatia.

China

• Jin Huaidi, emperor of the Jin Dynasty, is captured at Luoyang. The capital city is looted by Liu Cong, ruler of the Xiongnu state (Huns).

By topic

Religion

• July 2 – Pope Miltiades succeeds Pope Eusebius as the 32nd pope.
• The Donatist split occurs in the African church.

Births

Deaths

• Domitius Alexander, Roman usurper (approximate date)
• December 3 – Gaius Aurelius Valerius Diocletianus, Roman Emperor
• May 5 – Gaius Galerius Valerius Maximianus, Roman emperor
• November 25 – Saint Peter, Patriarch of Alexandria (martyred)
• Sima Yue, prince and regent of the Jin Dynasty