The start of the Mayan civilizationThe start of the Maya was a very great things from impact in economics/trade all the way to religious impacts this affected the way the world is today.
The start of the writing for the Maya700BC was the date that the Maya started to do their writing system to write down their thoughts and communicate.
The first Maya calendars are carvedIn 400BC the first Mayan calendars are carved into stone the calendars are where when the Maya keep track of their date.
The first Mayan templeThe pyramid of Kukulkan was the first Mayan pyrimaid ever built and it was to honor the feather serpent god.
The end of the Mayan civilizationThe decline of the Maya was a very sad thing in ancient history but the decline was cause by many factors that they could have fixed and they sadly ended in 900AD.