21

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This article is about the year 21. For other uses, see 21 (number).
Centuries: 1st Century BC · 1st century · 2nd century
Decades: 0s BC 0s 10s 20s 30s 40s 50s
Years: 18 19 20 21 22 23 24
21 by topic
Politics
State leaders - Sovereign states
Birth and death categories
Births - Deaths
Establishments and disestablishments categories
Establishments - Disestablishments
21 in other calendars
Gregorian calendar 21
XXI
Ab urbe condita 774
Armenian calendar N/A
Chinese calendar 2657/2717-12-29
(庚辰年十二月廿九日)
— to —
2658/2718-12-9
(辛巳年十二月初九日)
Ethiopian calendar 13 – 14
Hebrew calendar 3781 – 3782
Hindu calendars
- Vikram Samvat 76 – 77
- Shaka Samvat N/A
- Kali Yuga 3122 – 3123
Iranian calendar 601 BP – 600 BP
Islamic calendar 620 BH – 619 BH
Japanese calendar
- Imperial Year Kōki 681
(皇紀681年)
- Jōmon Era 10021
Thai solar calendar 564

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[edit] Arts and Sciences

  • Manufacture of pens and metal writing tools in Rome.

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