23

AD 23 in other calendars
Gregorian calendar	AD 23; XXIII
Ab urbe condita	776
Assyrian calendar	4773
Balinese saka calendar	N/A
Bengali calendar	−570
Berber calendar	973
Buddhist calendar	567
Burmese calendar	−615
Byzantine calendar	5531–5532
Chinese calendar	壬午年 (Water Horse); 2719 or 2659; — to —; 癸未年 (Water Goat); 2720 or 2660
Coptic calendar	−261 – −260
Discordian calendar	1189
Ethiopian calendar	15–16
Hebrew calendar	3783–3784
Hindu calendars
- Vikram Samvat	79–80
- Shaka Samvat	N/A
- Kali Yuga	3123–3124
Holocene calendar	10023
Iranian calendar	599 BP – 598 BP
Islamic calendar	617 BH – 616 BH
Javanese calendar	N/A
Julian calendar	AD 23; XXIII
Korean calendar	2356
Minguo calendar	1889 before ROC; 民前1889年
Nanakshahi calendar	−1445
Seleucid era	334/335 AG
Thai solar calendar	565–566
Tibetan calendar	阳水马年; (male Water-Horse); 149 or −232 or −1004; — to —; 阴水羊年; (female Water-Goat); 150 or −231 or −1003

Millennium:	1st millennium
Centuries:	1st century BC – 1st century – 2nd century
Decades:	0s BC 0s 10s – 20s – 30s 40s 50s
Years:	20 21 22 – 23 – 24 25 26

23 (XXIII) was a common year starting on Friday of the Julian calendar, the 23rd year of the Common Era (CE) and Anno Domini (AD) designations, the 23rd year of the 1st millennium, the 23rd year of the 1st century, and the 4th year of the 20s decade. As of the start of 23, the Gregorian calendar was 2 days behind the Julian calendar, which was the dominant calendar of the time.

Events

Strabo publishes Geography. It covers the world known to the Romans and Greeks at the time of Emperor Augustus.
Aelius Sejanus gains power in the Roman Senate and Tiberius.
Gaius Asinius Pollio, Gaius Antistius Vetus become consuls