In English, "post" also translates to "Lent" or "The Great Lent". It's a special name for the fast that takes place before easter (ie. the one that is happening now).
You could also say, "Fasting is hard".
That's what I wrote. It was accepted.
Not only could but should. "The fasting" just sounds wrong.
"Lent is hard" should also be accepted, Reported.