20 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

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

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.

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

for more information, see Category:20 BC births.