what's the furthest a calendar has gotten in active use? is our current the longest-running one?
Almost certain Chinese is older.
>>2754337
The Hebrew and Iranian calendars have been used for more than 2000 years.
>>2754373
Isn't there another system that's super old, like Thai?
The Mayan calendar has been in use for over 4000 years.
>>2754507
meh, their calendar was shit when 2012 ends
fucking retards they are,