Editing Maya calendar (section)

===Lunation length===
The present era lunar synodic period is about 29.5305877 [[Mean solar time|mean solar days]] or about 29 days 12 hours 44 minutes and 2+<sup>7</sup>/<sub>9</sub> seconds. As a whole number, the number of days per lunation will be either 29 or 30 days, with the 30-day intervals necessarily occurring slightly more frequently than the 29-day intervals. The Maya wrote whether the lunar month was 29 or 30 days as two glyphs: a glyph for lunation length followed by either a glyph made up of a moon glyph over a bundle with a suffix of 9 for a 29-day lunation or a moon glyph with a suffix of 10 for a 30-day lunation. Since the Maya didn't use fractions, lunations were approximated by using the formula that there were 149 lunations completed in 4400 days, which yielded a rather short mean month of exactly <sup>4400</sup>/<sub>149</sub> = 29+<sup>79</sup>/<sub>149</sub> days = 29 days 12 hours 43 minutes and 29+<sup>59</sup>/<sub>149</sub> seconds, or about 29.5302 days.<ref>Teeple 1931:67</ref>