Passover

===Fast of the Firstborn===
{{main|Fast of the Firstborn|siyum}}
On the day preceding the first Passover seder (or on Thursday morning preceding the seder, when the first seder falls on [[Motza'ei Shabbat]]), firstborn sons are commanded to celebrate the [[Fast of the Firstborn]] which commemorates the salvation of the Hebrew firstborns. According to Exodus 12:29, God struck down all Egyptian firstborns while the Israelites were not affected.<ref>{{bibleverse||Exodus|12:29|HE}}</ref> However, it is customary for synagogues to conduct a ''[[siyum]]'' (ceremony marking the completion of a section of [[Torah learning]]) right after [[Shacharit|morning prayers]], and the [[Seudat mitzvah|celebratory meal]] that follows cancels the firstborn's obligation to fast.