21

Millennium:	1st millennium
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

18 19 20 –21 –22 23 24

AD 21 in othercalendars
Gregorian calendar	AD 21 XXI
Ab urbe condita	774
Assyrian calendar	4771
Balinese saka calendar	N/A
Bengali calendar	−572
Berber calendar	971
Buddhist calendar	565
Burmese calendar	−617
Byzantine calendar	5529–5530
Chinese calendar	庚辰年(Metal Dragon) 2717 or 2657 — to — 辛巳年(Metal Snake) 2718 or 2658
Coptic calendar	−263 – −262
Discordian calendar	1187
Ethiopian calendar	13–14
Hebrew calendar	3781–3782
Hindu calendars
-Vikram Samvat	77–78
-Shaka Samvat	N/A
-Kali Yuga	3121–3122
Holocene calendar	10021
Iranian calendar	601 BP – 600 BP
Islamic calendar	619 BH – 618 BH
Javanese calendar	N/A
Julian calendar	AD 21 XXI
Korean calendar	2354
Minguo calendar	1891 beforeROC 民前1891年
Nanakshahi calendar	−1447
Seleucid era	332/333AG
Thai solar calendar	563–564
Tibetan calendar	阳金龙年 (male Iron-Dragon) 147 or −234 or −1006 — to — 阴金蛇年 (female Iron-Snake) 148 or −233 or −1005

AD 21 in othercalendars

AD 21
XXI

774

4771

N/A

−572