The Jewish day begins and ends at sundown. Thus, all holidays begin at sundown of the day preceding the date shown and end at sundown of the (last) day shown.

Since the Jewish calendar begins with Rosh Hashanah, the Jewish year always straddles two years from the civil calendar. In other words, spring holidays (such as Pesach and Shavuot) occur in the civil year following Rosh Hashanah. For example: Rosh Hashanah in the Jewish year 5759 occurs on September 21-22, 1998 and Passover in the same Jewish year occurs on April 1-2, 1999.