Year 21 BC was either a common year starting on Monday, Tuesday or Wednesday or a leap year starting on Tuesday of the Julian calendar. At the time, it was known as the Year of the Consulship of Lollius and Lepidus.

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: 24 BC 23 BC 22 BC21 BC20 BC 19 BC 18 BC
21 BC in other calendars
Gregorian calendar21 BC
XX BC
Ab urbe condita733
Ancient Greek era189th Olympiad, year 4
Assyrian calendar4730
Balinese saka calendarN/A
Bengali calendar−613
Berber calendar930
Buddhist calendar524
Burmese calendar−658
Byzantine calendar5488–5489
Chinese calendar己亥(Earth Pig)
2676 or 2616
    — to —
庚子年 (Metal Rat)
2677 or 2617
Coptic calendar−304 – −303
Discordian calendar1146
Ethiopian calendar−28 – −27
Hebrew calendar3740–3741
Hindu calendars
 - Vikram Samvat36–37
 - Shaka SamvatN/A
 - Kali Yuga3080–3081
Holocene calendar9980
Iranian calendar642 BP – 641 BP
Islamic calendar662 BH – 661 BH
Javanese calendarN/A
Julian calendar21 BC
XX BC
Korean calendar2313
Minguo calendar1932 before ROC
民前1932年
Nanakshahi calendar−1488
Seleucid era291/292 AG
Thai solar calendar522–523
Tibetan calendar阴土猪年
(female Earth-Pig)
106 or −275 or −1047
    — to —
阳金鼠年
(male Iron-Rat)
107 or −274 or −1046

Events

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Births

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