Issru Chag

From Halachipedia
  1. The minhag is to have a little more food and drink on the day following Pesach. [1]
  2. The minhag is not to fast on any Issru Chag, the day following a Yom Tov. [2]

References

  1. Rama 429:2 based on Shibolei HaLeket siman 262 and Sukkot 45b. See Maharil who explains that the reason for this is that the Korban Shlalmim of the holiday is eaten for 2 days and so it can be eaten even on the day after the holiday. See S"A HaRav who says that it is a minhag. See Birkei Yosef 494:4 who says that the Rambam, Rosh, and Rif don't consider it a significant day at all.
  2. Mishna Brurah 429:14