I approve of this with one change: the festival would last to the second exactly as long as it would take to synchronize the calendar to our orbit around the su

I approve of this with one change: the festival would last to the second exactly as long as it would take to synchronize the calendar to our orbit around the sun (no leap years or anything). Could you imagine a little more than five days with no representation on the calendar? Truly a "let everything go" period of time. Society would fall into chaos, no appointments could be made for those days because there is no way to address an exact point in time before the calendar reestablishment; truly an environment for a giant worldwide party. In reality tough we would just call it the 13th month, or the minimonth and everything would go business as usual :/