Fast Of First Born 2024. The rabbis declared that the day before passover, erev pesach, would be an eternal fast day for anyone who is firstborn, known as ta’anit bechorot (the fast of the firstborn). The fast of the firstborn (ta’anit bechorim) commemorates the horrific tenth plague that god inflicted.
The fast of the firstborn begins at sunrise and ends at nightfall (with the start of the seder). Fast of the firstborn (hebrew: