The Isru Chag celebration

Hi,

The day immediately following Pesach, Shavuot and Succot is called ‘Isru Chag’, and we do not fast on that day. It is also customary to have an augmented meal on that day, continuing the celebration of the holiday and demonstrating our love for it.

(Shulchan Aruch Orach Chaim 429:2; Mishneh Berurah 429:14)

Have a great day,
Mordechai