Telling Time by Moons

“The time of these conventions was generally set by a formula; the Indians could not go by the days of the month, so the date was fixed for a certain number of moons ahead, and the time set was ‘when the moon is straight up at sunset. ‘ When the moon was overhead at sunset it gave time for the pow-wow, and then the Indians had a full moon in which they could ride night and day going home.”