Adding a degree of festivity to the day as a practice has further been codified in
Ashkenazic communities, as
Moses Isserles (1520–1572) has stated in his glosses on the
Shulchan Aruch in the section
Orach Chayim:
Yisrael Meir Kagan (1838–1933) ruled that the
minhag (custom) is to generally forbid
fasting on Isru Chag, except in instances when as a result of great distress the community
synagogue decrees it. Almost all communities omit
tachanun (additional prayers of supplication) on Isru Chag. However, communities that follow the rulings of
Maimonides (1135–1204), such as the
Dor Daim (a movement founded in 19th century Yemen), maintain that the only days on which Tachanun is to be omitted are
Shabbat,
Jewish holidays,
Rosh HaShanah,
Rosh Chodesh,
Hanukkah,
Purim, and the
mincha on the eve of any Shabbat and holiday. ==See also==