Is it illegal to name your baby?

No, although our country does not promote religious beliefs. We have no objection to citizens' reasonable religious belief. This calculation of birthdays is a part of our country's Taoist culture, and it is also a part of our country's traditional culture similar to the Zhouyi culture. As long as you do not promote feudal superstition, it does not violate the law to choose a name by counting your birth date.