304

This article is about the year 304. For the number, see 304 (number). For other uses, see 304 (disambiguation).

Year 304 (CCCIV) was a leap year starting on Saturday (link will display the full calendar) of the Julian calendar. It was known in the Roman Empire as the Year of the Consulship of Diocletian and Maximian (or, less frequently, year 1057 Ab urbe condita). The denomination 304 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.

Millennium:	1st millennium
Centuries:	3rd century 4th century 5th century
Decades:	280s 290s 300s 310s 320s
Years:	301 302 303 304 305 306 307

304 in various calendars

Gregorian calendar	304 CCCIV
Ab urbe condita	1057
Assyrian calendar	5054
Balinese saka calendar	225–226
Bengali calendar	−289
Berber calendar	1254
Buddhist calendar	848
Burmese calendar	−334
Byzantine calendar	5812–5813
Chinese calendar	癸亥年 (Water Pig) 3001 or 2794     — to — 甲子年 (Wood Rat) 3002 or 2795
Coptic calendar	20–21
Discordian calendar	1470
Ethiopian calendar	296–297
Hebrew calendar	4064–4065
Hindu calendars
- Vikram Samvat	360–361
- Shaka Samvat	225–226
- Kali Yuga	3404–3405
Holocene calendar	10304
Iranian calendar	318 BP – 317 BP
Islamic calendar	328 BH – 327 BH
Javanese calendar	184–185
Julian calendar	304 CCCIV
Korean calendar	2637
Minguo calendar	1608 before ROC 民前1608年
Nanakshahi calendar	−1164
Seleucid era	615/616 AG
Thai solar calendar	846–847
Tibetan calendar	阴水猪年 (female Water-Pig) 430 or 49 or −723     — to — 阳木鼠年 (male Wood-Rat) 431 or 50 or −722

Saint Vincent of Saragossa

Events

By place

Roman Empire

• Caesar Galerius, perhaps accompanied by Emperor Diocletian, wins his fourth and final victory over the Carpi. Many of the surviving Carpi and Bastarnae are resettled in the Roman Empire, where they are split up. The Bastarnae are not attested after this time, and the Carpi are attested only once more in the 310s.
• Diocletian, while inspecting the Danube border, becomes seriously ill.
• Caesar Constantius I besieges a Germanic raiding force on an island in the Rhine and forces their surrender.

Asia

• Sixteen Kingdoms: The Xiongnu establishes the Han-Zhao state under Liu Yuan, often seen as the start of the Upheaval of the Five Barbarians.
• Cheng-Han earns its independence from Jin dynasty.
• Biryu becomes king of the Korean kingdom of Baekje.

By topic

Religion

• October 25 – Pope Marcellinus dies at Rome after an 8-year reign. The papal throne will remain vacant until 308.

Deaths

Pope Marcellinus

Saint Anastasia

• October 25 – Pope Marcellinus
• December 25 – Saint Anastasia (martyred)
• Date unknown
  • Saint Afra (martyred by fire)
  • Saint Agape, Chionia, and Irene (martyred)
  • Saint Agnes (martyred)
  • Saint Alban (possibly 309)
  • Bunseo of Baekje, king of Baekje (Korea)
  • Saint Florian (martyred)
  • Saint Gorgonius of Nicomedia (martyred)
  • Saint Juliana of Nicomedia (martyred)
  • Saint Lucy of Syracuse (martyred)
  • Saint Margaret (martyred)
  • Saint Pancras (martyred)
  • Saint Philomena (martyred)
  • Sima Ai, Chinese prince of the Jin dynasty (b. 277)
  • Saints Theodora and Didymus (martyred)
  • Saint Vincent of Saragossa (martyred)