51 BC

51 BC in various calendars
Gregorian calendar	51 BC; LI BC
Ab urbe condita	703
Ancient Egypt era	XXXIII dynasty, 273
- Pharaoh	Cleopatra VII, 1
Ancient Greek era	182nd Olympiad, year 2
Assyrian calendar	4700
Balinese saka calendar	N/A
Bengali calendar	−643
Berber calendar	900
Buddhist calendar	494
Burmese calendar	−688
Byzantine calendar	5458–5459
Chinese calendar	己巳年 (Earth Snake); 2647 or 2440; — to —; 庚午年 (Metal Horse); 2648 or 2441
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	3050–3051
Holocene calendar	9950
Iranian calendar	672 BP – 671 BP
Islamic calendar	693 BH – 692 BH
Javanese calendar	N/A
Julian calendar	N/A
Korean calendar	2283
Minguo calendar	1962 before ROC; 民前1962年
Nanakshahi calendar	−1518
Seleucid era	261/262 AG
Thai solar calendar	492–493
Tibetan calendar	阴土蛇年; (female Earth-Snake); 76 or −305 or −1077; — to —; 阳金马年; (male Iron-Horse); 77 or −304 or −1076

Millennium:	1st millennium BC
Centuries:	2nd century BC; 1st century BC ; 1st century;
Decades:	70s BC; 60s BC; 50s BC ; 40s BC; 30s BC;
Years:	54 BC; 53 BC; 52 BC; 51 BC ; 50 BC; 49 BC; 48 BC;

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.

Gregorian calendar	51 BC LI BC
Ab urbe condita	703
Ancient Egypt era	XXXIII dynasty, 273
- Pharaoh	Cleopatra VII, 1
Ancient Greek era	182nd Olympiad, year 2
Assyrian calendar	4700
Balinese saka calendar	N/A
Bengali calendar	−643
Berber calendar	900
Buddhist calendar	494
Burmese calendar	−688
Byzantine calendar	5458–5459
Chinese calendar	己巳年 (Earth Snake) 2647 or 2440 — to — 庚午年 (Metal Horse) 2648 or 2441
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	3050–3051
Holocene calendar	9950
Iranian calendar	672 BP – 671 BP
Islamic calendar	693 BH – 692 BH
Javanese calendar	N/A
Julian calendar	N/A
Korean calendar	2283
Minguo calendar	1962 before ROC 民前1962年
Nanakshahi calendar	−1518
Seleucid era	261/262 AG
Thai solar calendar	492–493
Tibetan calendar	阴土蛇年 (female Earth-Snake) 76 or −305 or −1077 — to — 阳金马年 (male Iron-Horse) 77 or −304 or −1076