 Additionally, Tachanun is omitted in a synagogue when a circumcision is taking place in the synagogue at that time, and when either the father of the baby, the sandek (the one who holds the baby during the circumcision), or the mohel (the one who performs the circumcision) is present.Most Nusach Sefard congregations omit Tachanun during mincha, primarily because it was common for Hasidic congregations to pray mincha after sunset, in which case Tachanun would be omitted.In Hasidic congregations, Tachanun is omitted on the anniversary of the death of various Rebbes (except Lubavitch makes a point of saying), since that is considered a day for religious renewal and celebration.