Celebrating Mawlid is worse than celebrating birthdays. I don’t consider birthdays haraam but i consider mawlid to be bid’ah.
People Celebrating their own birthdays is better than celebrating the birthday of the prophet!! This is because when a person celebrate their own birthday, it has no religious significance and the person has not added anything into the religion. However, for the mawlid(prophet’s birthday) it is as if one is adding a new practice into the religion and this falls under bid’ah which is condemned in the religion. Allah has completed His religion and we are not allowed to add anything to it. Those who celebrate mawlid have added a new practice into the religion. For normal birthdays, people just want to eat cakes and celebrate their life and be happy with their families and friends, they have not made it part of the religion. So the one who claims birthdays are bid’ah has fallen into clear error. The one who says its haraam might have a point. Likewise the one who says it’s halal might have a point. I am personally not even convinced that birthdays are haraam!!