The 360-day calendar is a method of measuring durations used in financial markets, in computer models, in ancient literature, and in prophetic literary genres.
[1] According to Plutarch's Parallel Lives Romans initially used a calendar which had 360 days, with varying length of months.
[2] However, Macrobius' Saturnalia and Censorinus' The Birthday Book, claim that the original Roman calendar had 304 days split into 10 months.
During this time, he heard of a prophecy that Nut, the sky goddess, would give birth to a son who would depose him.
However, in the course of playing he lost the game several times in succession, such that Thoth ended up winning from the moon a substantial measure of its light, equal to about five days.