Known to Jews as Pesach, it's a time of forgivenenss and letting go. After all, 'there is no saint who doesn't have a past, and no sinner who doesn't have a future.
The family holiday ritual meal is called the Seder.
The wicked son who mocks the Seder meal is not really wicked. After all, he has turned up.
Why were the rabbis discussing the laws of Pesach until morning? Well 'morning' in Hebrew is Shakhrit spelt: sh - kh - r - i - t - Shakhrit.
The 'sh' = the son who doesn't know how to ask. (she)
The 'kh' = the son who is wise (khacham)
The 'r' = the son who is wicked (rasha)
The 't' = the simple, pure or uncomplicated son (tam)
The extra yod? That stands for the divinity which combines them together. So 'morning' represents all the elements which go to make up a person: we are all at times unable to ask, at times wise, at times wicked and at times somewhat naive.
As Irene Lancaster says in her blog, quite an insight for a religion that some say is obsolete.