EWTN Catholic Q&A
Black armbands
Question from Dee on 04-02-2005:

Would it be appropriate for both men, women and children to wear a black armband for the next nine days as a show our grief?

Thank you.

Eternal rest grant him, O Lord, and may Your light shine upon him forever!

Answer by Colin B. Donovan, STL on 04-03-2005:

No, that is a secular practice. I know of no ecclesiastical precedent.