SHAFAQNA – The Grand Ayatollah Sistani answered questions about Muharram ceremonies.
Question: Is it Makroh or Haram to work on the Day of Ashura?
The Grand Ayatollah Sistani: It is appropriate that at the times of the martyrdom of Ahlul Bait (AS), shopkeepers close their shops, because keeping them open is considered to be disrespectful to Ahlul Bait (AS), and must be avoided.
Question: Is it Mostahab (religiously appropriate) or Makroh (religiously inappropriate) to wear black in the two months of Muharram and Safar?
The Grand Ayatollah Sistani: It is an appropriate and praiseworthy deed (to wear black in Muharram and Safar), and its Karaha has not been proved.
Question: Is there any problem to carry flags/banners or lights in front of mourning groups?
The Grand Ayatollah Sistani: There is no problem.
Source: PERSIAN SHAFAQNA