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 BC1st century BC1st century
Decades: 50s BC  40s BC  30s BC  – 20s BC –  10s BC  0s BC  0s
Years: 23 BC 22 BC 21 BC20 BC19 BC 18 BC 17 BC
20 BC in other calendars
Gregorian calendar20 BC
Ab urbe condita734
Ancient Greek era190th Olympiad (victor
Assyrian calendar4731
Balinese saka calendarN/A
Bengali calendar−612
Berber calendar931
Buddhist calendar525
Burmese calendar−657
Byzantine calendar5489–5490
Chinese calendar庚子(Metal Rat)
2677 or 2617
    — to —
辛丑年 (Metal Ox)
2678 or 2618
Coptic calendar−303 – −302
Discordian calendar1147
Ethiopian calendar−27 – −26
Hebrew calendar3741–3742
Hindu calendars
 - Vikram Samvat37–38
 - Shaka SamvatN/A
 - Kali Yuga3081–3082
Holocene calendar9981
Iranian calendar641 BP – 640 BP
Islamic calendar661 BH – 660 BH
Javanese calendarN/A
Julian calendar20 BC
Korean calendar2314
Minguo calendar1931 before ROC
Nanakshahi calendar−1487
Seleucid era292/293 AG
Thai solar calendar523–524
Tibetan calendar阳金鼠年
(male Iron-Rat)
107 or −274 or −1046
    — to —
(female Iron-Ox)
108 or −273 or −1045

Events change

Births change

for more information, see Category:20 BC births.