Question: how did the mayans come up with their calendar

title: Maya calendar
text: The Maya counted the lunations . This cycle appears in the lunar series as two glyphs that modern scholars call the ' C ' and ' X ' glyphs . The C glyph could be prefixed with a number indicating the lunation . No prefixing number meant one , whereas the numbers two through six indicated the other lunations . There was also a part of the C glyph that indicated where this fell in a larger cycle of 18 lunations . Accompanying the C glyph was the ' X ' glyph that showed a similar pattern of 18 lunations . Lunation