On the Times Commonly Presented for Birkat HaL’vana: Part 1
Abstract Typical Jewish calendars list two particular z’manim for “the first time that one may begin to recite kiddush l’vana (or birkat hal’vana).” The first is referred to as minhag yerushalayim or minhag haperushim, or simply “the three-day minhag,” and the second time, to wait for seven days to pass from the start of the lunar month to recite the blessing, is attributed to the Shulhan Aruch. These two times are calculated as exactly either 72 hours or 168 hours…