21 BC

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Millennium: 1st millennium BC
Centuries:
Decades:
Years:
21 BC in various calendars
Gregorian calendar 21 BC
XX BC
Ab urbe condita 733
Ancient Greek era 189th Olympiad, year 4
Assyrian calendar 4730
Balinese saka calendar N/A
Bengali calendar −613
Berber calendar 930
Buddhist calendar 524
Burmese calendar −658
Byzantine calendar 5488–5489
Chinese calendar 己亥(Earth Pig)
2676 or 2616
    — to —
庚子年 (Metal Rat)
2677 or 2617
Coptic calendar −304 – −303
Discordian calendar 1146
Ethiopian calendar −28 – −27
Hebrew calendar 3740–3741
Hindu calendars
 - Vikram Samvat 36–37
 - Shaka Samvat N/A
 - Kali Yuga 3080–3081
Holocene calendar 9980
Iranian calendar 642 BP – 641 BP
Islamic calendar 662 BH – 661 BH
Javanese calendar N/A
Julian calendar 21 BC
XX BC
Korean calendar 2313
Minguo calendar 1932 before ROC
民前1932年
Nanakshahi calendar −1488
Seleucid era 291/292 AG
Thai solar calendar 522–523
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

Year 21 BC was either a common year starting on Monday, Tuesday or Wednesday or a leap year starting on Tuesday (link will display the full calendar) of the Julian calendar (the sources differ, see leap year error for further information) and a leap year starting on Sunday of the Proleptic Julian calendar. At the time, it was known as the Year of the Consulship of Lollius and Lepidus (or, less frequently, year 733 Ab urbe condita). The denomination 21 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.

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Roman Empire[edit]


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