Here is a great post about the Extra Days Upon the Year (Birthdays of Wesir, Heru Wer, Set, Aset and Nebet Het) and Wep Ronpet or the Kemetic New Year.
I wanted to add that there are prayers to say to each deity on their Birthday on the Cairo Calendar in Bob Brier’s book Ancient Egyptian Magic page 252.
Fiercely Bright One 