How did Mesoamericans elaborated calendars?

Mesoamerican calendars are the calendrical systems devised and used by the pre-Columbian cultures of Mesoamerica

Explanation:

Besides keeping time, Mesoamerican calendars were also used in religious observances and social rituals, such as for divination.

i do not know if this question has options, but a main impact of the federal reserve act of 1913, which created the federal reserve bank, was the international use of the u.s. dollar, which soon became the world's leading currency - particularly during world war i, since many nations around the world asked the united states for money.