337

337 (CCCXXXVII) was a common year starting on Saturday of the Julian calendar, the 337th year of the Common Era (CE) and Anno Domini (AD) designations, the 337th year of the 1st millennium, the 37th year of the 4th century, and the 8th year of the 330s decade. As of the start of 337, 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:	300s  310s  320s  – 330s –  340s  350s  360s
Years:	334 335 336 – 337 – 338 339 340

337 in other calendars

Gregorian calendar	337 CCCXXXVII
Ab urbe condita	1090
Assyrian calendar	5087
Balinese saka calendar	258–259
Bengali calendar	−256
Berber calendar	1287
Buddhist calendar	881
Burmese calendar	−301
Byzantine calendar	5845–5846
Chinese calendar	丙申年 (Fire Monkey) 3033 or 2973     — to — 丁酉年 (Fire Rooster) 3034 or 2974
Coptic calendar	53–54
Discordian calendar	1503
Ethiopian calendar	329–330
Hebrew calendar	4097–4098
Hindu calendars
- Vikram Samvat	393–394
- Shaka Samvat	258–259
- Kali Yuga	3437–3438
Holocene calendar	10337
Iranian calendar	285 BP – 284 BP
Islamic calendar	294 BH – 293 BH
Javanese calendar	218–219
Julian calendar	337 CCCXXXVII
Korean calendar	2670
Minguo calendar	1575 before ROC 民前1575年
Nanakshahi calendar	−1131
Seleucid era	648/649 AG
Thai solar calendar	879–880
Tibetan calendar	阳火猴年 (male Fire-Monkey) 463 or 82 or −690     — to — 阴火鸡年 (female Fire-Rooster) 464 or 83 or −689

Deaths

• May 22 — Constantine I, Roman Emperor