First Lecture
You can see this if you look at the calendars of ancient times: there were different calendars, for example, some that assumed 354 days and others that assumed 365 days. These calendars had leap days or leap weeks inserted into them to compensate for the discrepancy between human calculations and the true course of the cosmos. What people were able to calculate never coincided with the true course of the cosmos. There was always a small remainder somewhere. Now, the priests of the ancient mysteries paid particular attention to this small remainder where human time calculation did not correspond to the cosmic course of the world. They determined these specific times when this mismatch was particularly noticeable by dividing the year into months and weeks, leaving them with a certain number of days between lunar months until the beginning of the next year.