The first day of the long count calender takes place in midsummer.
Mayans begin digging irrigation canals to increase crop yields.
Solar calendars came into use by the mayans.
The ruler Pakal the great dies in the city of Palenque.
Mayan cities break down, some cities conflict over land and wealth.
Tikal reaches its peak and begins to decline
Tikal was abandoned.
Northern Maya cities on Yucatan Peninsula begin to be abandoned.
The lords of Xiu killed the ruler of Mayapan and burn the city.