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Millennium: 1st millennium
304 in various calendars
Gregorian calendar304
Ab urbe condita1057
Assyrian calendar5054
Balinese saka calendar225–226
Bengali calendar−289
Berber calendar1254
Buddhist calendar848
Burmese calendar−334
Byzantine calendar5812–5813
Chinese calendar癸亥年 (Water Pig)
3000 or 2940
    — to —
甲子年 (Wood Rat)
3001 or 2941
Coptic calendar20–21
Discordian calendar1470
Ethiopian calendar296–297
Hebrew calendar4064–4065
Hindu calendars
 - Vikram Samvat360–361
 - Shaka Samvat225–226
 - Kali Yuga3404–3405
Holocene calendar10304
Iranian calendar318 BP – 317 BP
Islamic calendar328 BH – 327 BH
Javanese calendar184–185
Julian calendar304
Korean calendar2637
Minguo calendar1608 before ROC
Nanakshahi calendar−1164
Seleucid era615/616 AG
Thai solar calendar846–847
Tibetan calendar阴水猪年
(female Water-Pig)
430 or 49 or −723
    — to —
(male Wood-Rat)
431 or 50 or −722

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.


By place[edit]

Roman Empire[edit]

  • 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.


By topic[edit]





  1. ^ a b "List of Rulers of Korea". www.metmuseum.org. Retrieved April 20, 2019.
  2. ^ Knechtges, David R.; Chang, Taiping (2010). Ancient and Early Medieval Chinese Literature (vol.I): A Reference Guide, Part One. BRILL. p. 542. ISBN 9789004191273.