Assuming you follow the tradition that only first-born males are obligated to fast the day before Passover, do the males who have an older sister count as first-born or not? Wikipedia doesn't seem to ...
Does someone who was a first born, but was born from a C-section have to fast on Ta'anis Bechoros? The only source I know which addresses this is the Kaf HaChaim on Shulchan Aruch (470:3), who says ...
I've heard that some men fast on erev Pesach for their firstborn son until that son old enough to fast for himself. Is that halakha? Where does this come from?
I'm interested in the question of whether a ger who is firstborn (of both parents, say, to keep things simple) must follow the rules for Ta'anit B'khorot. There are some remarks on the wikipedia page, ...
When the first Seder falls on Motzei Shabbas, Ta'anit Bechorot is pushed back to Thursday. Why does it stay on Friday when Pesach falls out on Shabbas?