Answered by Sayyidi Habib Umar bin Hafiz (may Allah protect him and benefit us by him)
How can we attend mawlid gatherings sincerely for the sake of Allah?
We should attend seeking the pleasure of the Creator through loving and venerating His Prophet ﷺ and mentioning his attributes. We should then think about how we can act upon what we hear, and improve our following of the Prophet and making a firm resolve to attain the attributes that we hear mentioned. If we do this in every mawlid we attend we will be connected to the spirit and aims of the mawlid.