1 BC

1 BC in various calendars
Gregorian calendar	1 BC; I BC
Ab urbe condita	753
Ancient Greek era	194th Olympiad, year 4
Assyrian calendar	4750
Balinese saka calendar	N/A
Bengali calendar	−593
Berber calendar	950
Buddhist calendar	544
Burmese calendar	−638
Byzantine calendar	5508–5509
Chinese calendar	己未年 (Earth Goat); 2697 or 2490; — to —; 庚申年 (Metal Monkey); 2698 or 2491
Coptic calendar	−284 – −283
Discordian calendar	1166
Ethiopian calendar	−8 – −7
Hebrew calendar	3760–3761
Hindu calendars
- Vikram Samvat	56–57
- Shaka Samvat	N/A
- Kali Yuga	3100–3101
Holocene calendar	10000
Iranian calendar	622 BP – 621 BP
Islamic calendar	641 BH – 640 BH
Javanese calendar	N/A
Julian calendar	1 BC; I BC
Korean calendar	2333
Minguo calendar	1912 before ROC; 民前1912年
Nanakshahi calendar	−1468
Seleucid era	311/312 AG
Thai solar calendar	542–543
Tibetan calendar	阴土羊年; (female Earth-Goat); 126 or −255 or −1027; — to —; 阳金猴年; (male Iron-Monkey); 127 or −254 or −1026

Millennium:	1st millennium BC
Centuries:	2nd century BC; 1st century BC ; 1st century;
Decades:	20s BC; 10s BC; 0s BC ; 0s; 10s;
Years:	4 BC; 3 BC; 2 BC; 1 BC ; AD 1; AD 2; AD 3;

Year 1 BC was a common year starting on Friday or Saturday in the Julian calendar (the sources differ; see leap year error for further information) and a leap year starting on Thursday in the proleptic Julian calendar. It was also a leap year starting on Saturday in the Proleptic Gregorian calendar. At the time, it was known as the Year of the Consulship of Lentulus and Piso (or, less frequently, year 753 Ab urbe condita). The denomination 1 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. The following year is AD 1 in the widely used Julian calendar and the proleptic Gregorian calendar, which both do not have a "year zero".

^ Meier, John P. (1991). "A Chronology of Jesus' Life". A Marginal Jew: Rethinking the Historical Jesus. Vol. v. 1. Anchor Bible Reference Library. pp. 373–433.

Gregorian calendar	1 BC I BC
Ab urbe condita	753
Ancient Greek era	194th Olympiad, year 4
Assyrian calendar	4750
Balinese saka calendar	N/A
Bengali calendar	−593
Berber calendar	950
Buddhist calendar	544
Burmese calendar	−638
Byzantine calendar	5508–5509
Chinese calendar	己未年 (Earth Goat) 2697 or 2490 — to — 庚申年 (Metal Monkey) 2698 or 2491
Coptic calendar	−284 – −283
Discordian calendar	1166
Ethiopian calendar	−8 – −7
Hebrew calendar	3760–3761
Hindu calendars
- Vikram Samvat	56–57
- Shaka Samvat	N/A
- Kali Yuga	3100–3101
Holocene calendar	10000
Iranian calendar	622 BP – 621 BP
Islamic calendar	641 BH – 640 BH
Javanese calendar	N/A
Julian calendar	1 BC I BC
Korean calendar	2333
Minguo calendar	1912 before ROC 民前1912年
Nanakshahi calendar	−1468
Seleucid era	311/312 AG
Thai solar calendar	542–543
Tibetan calendar	阴土羊年 (female Earth-Goat) 126 or −255 or −1027 — to — 阳金猴年 (male Iron-Monkey) 127 or −254 or −1026