I have been to many different communities during Muharram, and they differ in their mourning periods. Is there any specific guideline in our Hadith for mourning after Ashura or is any continued mourning after then purely cultural practice?
Muharram and Safar are the two months during which we mourn the tragedies of Karbala and avoid celebrations. Different countries have their own way of observing the mourning but all Shia Muslims express their grief on the tragedies of Ahlul Bayt (AS) by avoiding celebrations during Muharram and Safar.
Wassalam.