51 BC

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Millennium: 1st millennium BC
Centuries: 2nd century BC1st century BC1st century
Decades: 80s BC  70s BC  60s BC  – 50s BC –  40s BC  30s BC  20s BC
Years: 54 BC 53 BC 52 BC51 BC50 BC 49 BC 48 BC
51 BC by topic
State leadersSovereign states
Birth and death categories
Establishments and disestablishments categories
51 BC in other calendars
Gregorian calendar 51 BC
Ab urbe condita 703
Armenian calendar N/A
Assyrian calendar 4700
Bahá'í calendar −1894 – −1893
Bengali calendar −643
Berber calendar 900
English Regnal year N/A
Buddhist calendar 494
Burmese calendar −688
Byzantine calendar 5458–5459
Chinese calendar 己巳(Earth Snake)
2646 or 2586
    — to —
庚午年 (Metal Horse)
2647 or 2587
Coptic calendar −334 – −333
Discordian calendar 1116
Ethiopian calendar −58 – −57
Hebrew calendar 3710–3711
Hindu calendars
 - Vikram Samvat 6–7
 - Shaka Samvat N/A
 - Kali Yuga 3051–3052
Holocene calendar 9950
Igbo calendar −1050 – −1049
Iranian calendar 672 BP – 671 BP
Islamic calendar 693 BH – 692 BH
Japanese calendar N/A
Juche calendar N/A
Julian calendar N/A
Korean calendar 2283
Minguo calendar 1962 before ROC
Thai solar calendar 493

Year 51 BC was a year of the pre-Julian Roman calendar. At the time, it was known as the Year of the Consulship of Marcellus and Sulpicius (or, less frequently, year 703 Ab urbe condita). The denomination 51 BC 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 Republic[edit]



  • The Hsiung-nu split into two hordes. The Eastern horde is subject to China.