What is the ruling regarding personal or national celebrations coinciding with sad anniversaries of Ahlulbait…

Answer

In the name of Allah: It is not suitable and not permissible for a believer to attend any celebrations in a sad anniversary of Ahlulbait (PBUH). Allah is right to put the doer of such things with the enemies of Ahlulbait (PBUH). It is narrated by the infallibles (PBUH) that the Shia followers are created from same mud of the infallibles' and they cheer for the infallibles' happiness and grieve for their sorrow. Allah knows best.