The order today is not the primeval order; it was established less than twenty-seven centuries ago. Numerous evidences are preserved which prove that prior to the year of 365¼ days, the year was only 360 days long. All around the globe the years following -687 saw activity directed toward reforming the calendar. Between -747 and -687 the calendar was in a chaotic state, the length of the year and of the month, and probably also of the day, repeatedly changing. Before the eighth century there was a comparatively long span of time when the year had 360 days and the lunar month consisted of almost exactly thirty days.