20 BC

Year 20 BC was either a common year starting on Wednesday or Thursday or a leap year starting on Tuesday, Wednesday or Thursday of the Julian calendar. At the time, it was known as the Year of the Consulship of Appuleius and Nerva.

Millennium:	1st millennium BC
Centuries:	2nd century BC – 1st century BC – 1st century
Decades:	50s BC  40s BC  30s BC  – 20s BC –  10s BC  0s BC  0s
Years:	23 BC 22 BC 21 BC – 20 BC – 19 BC 18 BC 17 BC

20 BC in other calendars

Gregorian calendar	20 BC XIX BC
Ab urbe condita	734
Ancient Greek era	190th Olympiad (victor)¹
Assyrian calendar	4731
Balinese saka calendar	N/A
Bengali calendar	−612
Berber calendar	931
Buddhist calendar	525
Burmese calendar	−657
Byzantine calendar	5489–5490
Chinese calendar	庚子年 (Metal Rat) 2677 or 2617     — to — 辛丑年 (Metal Ox) 2678 or 2618
Coptic calendar	−303 – −302
Discordian calendar	1147
Ethiopian calendar	−27 – −26
Hebrew calendar	3741–3742
Hindu calendars
- Vikram Samvat	37–38
- Shaka Samvat	N/A
- Kali Yuga	3081–3082
Holocene calendar	9981
Iranian calendar	641 BP – 640 BP
Islamic calendar	661 BH – 660 BH
Javanese calendar	N/A
Julian calendar	20 BC XIX BC
Korean calendar	2314
Minguo calendar	1931 before ROC 民前1931年
Nanakshahi calendar	−1487
Seleucid era	292/293 AG
Thai solar calendar	523–524
Tibetan calendar	阳金鼠年 (male Iron-Rat) 107 or −274 or −1046     — to — 阴金牛年 (female Iron-Ox) 108 or −273 or −1045

Events

• Rome and Parthia make a peace treaty
• King Herod the Great begins to renovate the Temple in Jerusalem
• Maison Carrée, Nîmes, France, is built (approximate date)
• Marcus Verrius Flaccus' dictionary De verborum significatu is published. It is one of the first great dictionaries in history.
• Shakas no longer control northwest India

Births

for more information, see Category:20 BC births.

• Gaius Caesar, grandson of Augustus Caesar (d. AD 4)
• Philo, the philosopher (approximate date) (d. AD 50)