Answered by Ustadh Salman Younas
Question: A lot of the Indo-Pak cultures have this rule which forbids to buy or wear new clothes or house items etc. in Muharram. What is the basis of this?
Answer: Assalamu `alaykum
There is no evidence to support the claim that we are not allowed to wear new clothes, buy house items, celebrate marriages, and so forth during the month of Muharram. To abstain from these actions with the belief that it is religiously required is falling into blameworthy innovation.
For more details on the month of Muharram, its merits, and what the religion has sanctioned in terms of specific practices that are recommended to perform during the mont, please refer to the following answers:
Checked & Approved by Shaykh Faraz Rabbani.