Class Three. Page 48-50. The birth of a Rabbinic “דברי קבלה” holiday takes time to determine if the people can handle the new גזירה. Examples of Chanuka and even of Purim. This will (of course) tie into 12 Tamuz.
Class Four. Page 50-52. The same happened 12 Tamuz it took a year to establish it as a Yom Tov But once established it is a must on all those who endorsed it and under the category of לא תסור מכל אשר יורוך
