Q. Is it worthwhile this year that Motzei Shabbos is Tisha Beav nidche, to make Maariv later and let the people go home to change to weekday clothing?

A. Since when Tisha Beav is Motzei Shabbat you have to stop eating on Shabbos afternoon before the shkia, many shuls daven mincha earlier, either a half an hour after chatzos (astronomical noon) or at a later hour, earlier than in a regular Shabbos. This is to give enough time for people to eat their Shalosh Seudos meal. Since it is the last meal before the fast and people have different needs and wants, it is customary that people eat this meal at home. They stop eating before sunset and wait until the end of Shabbos. After Shabbos ended and they said Hamavdil ben kodesh lechol, they return to shul for maariv wearing already weekday clothing and permissible shoes.

Rabbi A. Bartfeld as revised by Horav Shlomo Miller Shlit”a