Calendar Dates
Gregorian Calendar
Current date
Today
When it started
1582 CE, introduced by Pope Gregory XIII
Notes
Common modern international calendar. Its year count is traditionally linked to the birth of Jesus.
Hebrew Calendar
Current date
Today
When it started
Traditional epoch: 3761 BCE
Notes
Linked to the calculated creation of the world.
Islamic Calendar
Current date
Today
When it started
622 CE
Notes
Starts from the Hijra.
Buddhist Calendar
Current date
Today
When it started
Traditional epoch: 543 BCE
Notes
Associated with the death/parinirvana of the Buddha.
Japanese Calendar
Current date
Today
When it started
Uses imperial eras
Notes
The era changes when a new emperor begins ruling.
Persian Calendar
Current date
Today
When it started
622 CE
Notes
Solar calendar counted from the Hijra.
Indian National Calendar
Current date
Today
When it started
78 CE, the Saka Era
Notes
Official civil calendar of India alongside the Gregorian calendar.
Chinese Calendar
Current date
Today
When it started
Ancient traditional calendar
Notes
No single universally agreed starting year.
Some start dates are religious, historical, or traditional estimates.