20
| Millennium: | 1st millennium |
|---|---|
| Centuries: | 1st century BC – 1st century – 2nd century |
| Decades: | 0s BC 0s 10s – 20s – 30s 40s 50s |
| Years: | 17 18 19 – 20 – 21 22 23 |
| Gregorian calendar | AD 20 XX |
| Ab urbe condita | 773 |
| Assyrian calendar | 4770 |
| Balinese saka calendar | N/A |
| Bengali calendar | −573 |
| Berber calendar | 970 |
| Buddhist calendar | 564 |
| Burmese calendar | −618 |
| Byzantine calendar | 5528–5529 |
| Chinese calendar | 己卯年 (Earth Rabbit) 2716 or 2656 — to — 庚辰年 (Metal Dragon) 2717 or 2657 |
| Coptic calendar | −264 – −263 |
| Discordian calendar | 1186 |
| Ethiopian calendar | 12–13 |
| Hebrew calendar | 3780–3781 |
| Hindu calendars | |
| - Vikram Samvat | 76–77 |
| - Shaka Samvat | N/A |
| - Kali Yuga | 3120–3121 |
| Holocene calendar | 10020 |
| Iranian calendar | 602 BP – 601 BP |
| Islamic calendar | 621 BH – 619 BH |
| Javanese calendar | N/A |
| Julian calendar | AD 20 XX |
| Korean calendar | 2353 |
| Minguo calendar | 1892 before ROC 民前1892年 |
| Nanakshahi calendar | −1448 |
| Seleucid era | 331/332 AG |
| Thai solar calendar | 562–563 |
| Tibetan calendar | 阴土兔年 (female Earth-Rabbit) 146 or −235 or −1007 — to — 阳金龙年 (male Iron-Dragon) 147 or −234 or −1006 |
20 is a year in the 1st century. It was a leap year starting on Monday of the Julian calendar. At the time, it was known as the Year of the Consulship of Marcus Valerius Messalla Barbatus and Cotta.
Events
- Tiberias is built on the Sea of Galilee by Herod Antipas.
- Galba is a Roman praetor.
- Marcus Valerius Messalla Barbatus becomes a consul.
- First year of Dihuang era of the Chinese Xin Dynasty.
- Philo defines philosophy as the maidservant of theology.
Deaths
- Gnaeus Calpurnius Piso, Roman statesman and governor of Syria (b. 44 BC)
- Vipsania Agrippina, wife of Gaius Asinius Gallus and former wife of Tiberius (b. 36 BC)