323

323 (CCCXXIII) was a common year starting on Tuesday of the Julian calendar, the 323rd year of the Common Era (CE) and Anno Domini (AD) designations, the 323rd year of the 1st millennium, the 23rd year of the 4th century, and the 4th year of the 320s decade. As of the start of 323, the Gregorian calendar was 1 day ahead of the Julian calendar, which was the dominant calendar of the time.

Millennium:	1st millennium
Centuries:	3rd century – 4th century – 5th century
Decades:	290s  300s  310s  – 320s –  330s  340s  350s
Years:	320 321 322 – 323 – 324 325 326

323 in other calendars

Gregorian calendar	323 CCCXXIII
Ab urbe condita	1076
Assyrian calendar	5073
Balinese saka calendar	244–245
Bengali calendar	−270
Berber calendar	1273
Buddhist calendar	867
Burmese calendar	−315
Byzantine calendar	5831–5832
Chinese calendar	壬午年 (Water Horse) 3019 or 2959     — to — 癸未年 (Water Goat) 3020 or 2960
Coptic calendar	39–40
Discordian calendar	1489
Ethiopian calendar	315–316
Hebrew calendar	4083–4084
Hindu calendars
- Vikram Samvat	379–380
- Shaka Samvat	244–245
- Kali Yuga	3423–3424
Holocene calendar	10323
Iranian calendar	299 BP – 298 BP
Islamic calendar	308 BH – 307 BH
Javanese calendar	204–205
Julian calendar	323 CCCXXIII
Korean calendar	2656
Minguo calendar	1589 before ROC 民前1589年
Nanakshahi calendar	−1145
Seleucid era	634/635 AG
Thai solar calendar	865–866
Tibetan calendar	ཆུ་ཕོ་རྟ་ལོ་ (male Water-Horse) 449 or 68 or −704     — to — ཆུ་མོ་ལུག་ལོ་ (female Water-Sheep) 450 or 69 or −703

Events

• July 3 – In the Battle of Adrianople, Constantine the Great defeats Licinius, who flees to Byzantium.