42 BC

42 BC in various calendars
Gregorian calendar	42 BC; XLII BC
Ab urbe condita	712
Ancient Egypt era	XXXIII dynasty, 282
- Pharaoh	Cleopatra VII, 10
Ancient Greek era	184th Olympiad, year 3
Assyrian calendar	4709
Balinese saka calendar	N/A
Bengali calendar	−634
Berber calendar	909
Buddhist calendar	503
Burmese calendar	−679
Byzantine calendar	5467–5468
Chinese calendar	戊寅年 (Earth Tiger); 2656 or 2449; — to —; 己卯年 (Earth Rabbit); 2657 or 2450
Coptic calendar	−325 – −324
Discordian calendar	1125
Ethiopian calendar	−49 – −48
Hebrew calendar	3719–3720
Hindu calendars
- Vikram Samvat	15–16
- Shaka Samvat	N/A
- Kali Yuga	3059–3060
Holocene calendar	9959
Iranian calendar	663 BP – 662 BP
Islamic calendar	683 BH – 682 BH
Javanese calendar	N/A
Julian calendar	42 BC; XLII BC
Korean calendar	2292
Minguo calendar	1953 before ROC; 民前1953年
Nanakshahi calendar	−1509
Seleucid era	270/271 AG
Thai solar calendar	501–502
Tibetan calendar	阳土虎年; (male Earth-Tiger); 85 or −296 or −1068; — to —; 阴土兔年; (female Earth-Rabbit); 86 or −295 or −1067

Millennium:	1st millennium BC
Centuries:	2nd century BC; 1st century BC ; 1st century;
Decades:	60s BC; 50s BC; 40s BC ; 30s BC; 20s BC;
Years:	45 BC; 44 BC; 43 BC; 42 BC ; 41 BC; 40 BC; 39 BC;

Year 42 BC was either a common year starting on Monday, Tuesday or Wednesday or a leap year starting on Tuesday (link will display the full calendar) of the Julian calendar (the sources differ, see leap year error for further information) and a common year starting on Tuesday of the Proleptic Julian calendar. At the time, it was known as the Year of the Consulship of Lepidus and Plancus (or, less frequently, year 712 Ab urbe condita). The denomination 42 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	42 BC XLII BC
Ab urbe condita	712
Ancient Egypt era	XXXIII dynasty, 282
- Pharaoh	Cleopatra VII, 10
Ancient Greek era	184th Olympiad, year 3
Assyrian calendar	4709
Balinese saka calendar	N/A
Bengali calendar	−634
Berber calendar	909
Buddhist calendar	503
Burmese calendar	−679
Byzantine calendar	5467–5468
Chinese calendar	戊寅年 (Earth Tiger) 2656 or 2449 — to — 己卯年 (Earth Rabbit) 2657 or 2450
Coptic calendar	−325 – −324
Discordian calendar	1125
Ethiopian calendar	−49 – −48
Hebrew calendar	3719–3720
Hindu calendars
- Vikram Samvat	15–16
- Shaka Samvat	N/A
- Kali Yuga	3059–3060
Holocene calendar	9959
Iranian calendar	663 BP – 662 BP
Islamic calendar	683 BH – 682 BH
Javanese calendar	N/A
Julian calendar	42 BC XLII BC
Korean calendar	2292
Minguo calendar	1953 before ROC 民前1953年
Nanakshahi calendar	−1509
Seleucid era	270/271 AG
Thai solar calendar	501–502
Tibetan calendar	阳土虎年 (male Earth-Tiger) 85 or −296 or −1068 — to — 阴土兔年 (female Earth-Rabbit) 86 or −295 or −1067