Q&A: Make-up for the Fast of the Firstborn
Originally published:
This is an English translation (via GPT-5.4). Read the original Hebrew version.
Make-up for the Fast of the Firstborn
Question
I forgot that today is the Fast of the Firstborn and I ate. Do I need to fast on another day as make-up?
Answer
It doesn’t seem so to me. You did not personally accept it upon yourself; it is only a custom. But when someone eats on a fast day, he still completes the rest of the fast.