Eras and Year Counts

The Anno Domini system was devised in 525 in Rome by the monk Dionysius Exiguus for his Easter tables, counting years from his...

The Hebrew calendar counts years from a traditional date of creation corresponding to 3761 BCE in the proleptic Julian calendar...

The Byzantine Empire dated years from creation, placed on 1 September 5509 BCE, with the year beginning in September. The count...

Islamic years are counted from the Hijra, Muhammad's migration from Mecca to Medina in 622. Because the Hijri year is about 11...

Ab urbe condita, from the founding of the city, counts years from the traditional founding of Rome, which the scholar Varro...

The Seleucid era counts from Seleucus I's recapture of Babylon, in autumn 312 BCE in the Macedonian reckoning or spring 311 BCE...

Greek historians dated events by Olympiads, four-year periods beginning with the traditional first Olympic Games of 776 BCE...

The Buddhist Era counts years from the parinirvana of the Buddha according to Theravada tradition. In Thailand it is the official...

Vikram Samvat counts years from 57 BCE and is traditionally linked to the legendary king Vikramaditya. It is widely used in...

The Shaka era begins in 78 CE and became the standard era of Indian astronomers. The Indian national calendar adopted in 1957...

Japan names years by eras, nengō, starting with Taika in 645 and continuous since 701. Since the Meiji Restoration in 1868 there...

The Minguo calendar counts years from the founding of the Republic of China in 1912, which is year 1. It uses Gregorian months...

The Dangi era counts years from the legendary founding of Gojoseon by Dangun in 2333 BCE. South Korea used it officially from...

The scientist Cesare Emiliani proposed in 1993 adding 10,000 to Common Era years, so 2026 becomes 12026 HE. The epoch roughly...

Unix time counts seconds since 00:00:00 UTC on 1 January 1970, ignoring leap seconds. It underlies timestamps in most computer...

Astronomers count days continuously as Julian Day Numbers from noon Universal Time on 1 January 4713 BCE in the proleptic Julian...

Zoroastrians count years from the accession of the last Sasanian king, Yazdegerd III, in 632 CE, an era the community kept after...

Indian tradition counts the Kali Yuga, the fourth and last world age, from a traditional date of 23 January 3102 BCE, the death...

Ptolemy dated ancient observations from the first regnal year of the Babylonian king Nabonassar, beginning 26 February 747 BCE in...