# The Classic Maya Calendar and Day Numbering System

**URL:** <https://community.nwtime.org/t/the-classic-maya-calendar-and-day-numbering-system/250>\
**Category:** Dave Mills Library\
**Created:** [February 11, 2026, 7:36pm UTC](https://community.nwtime.org/t/the-classic-maya-calendar-and-day-numbering-system/250 "2026-02-11T19:36:02Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Dru](https://sea1.discourse-cdn.com/flex001/user_avatar/community.nwtime.org/dru/32/337_2.png) [@Dru](https://community.nwtime.org/u/Dru)\
**Post date:** [February 11, 2026, 7:36pm UTC](https://community.nwtime.org/t/the-classic-maya-calendar-and-day-numbering-system/250/1 "2026-02-11T19:36:02Z")

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> **[The Classic Maya Calendar and Day Numbering System](https://www.ntp.org/reflib/maya/)**
>
> The Classic Maya civilization of southern Mexico, Guatemala, and Belize flourished in the fourth through tenth century CE. They were accomplished astronomers and crafted a fascinating calendar system. They used a base-20 number system which included...