The horoscope is not based on the new calendar (solar calendar), but on the lunar calendar (lunar calendar). What you have provided at this time is only a new calendar, so it is impossible to tell what day your baby was born? You don’t have the year, so you can’t calculate it!
You need to name the child based on his horoscope, record the year and month of the child's birth according to the lunar calendar, and then find out the time of the child's birth. A simple understanding is what time the child was born, and which time it belongs to at 12 o'clock. If you don’t understand the calculation of time, you can directly search the Heavenly Stems and Earthly Branches on Baidu to get the answer.
After these data are sorted out, let’s check what is missing in the life of this baby born with the horoscope. It can be calculated through the horoscopes. If you really don't understand, you can ask a master for advice. There are fortune tellers who specialize in this job. Or buy a book about horoscopes to read, but this is quite troublesome.
If you think these methods are too troublesome, just choose a name online! When you enter the year, month and day of your child's birth, you can easily get the answer, and a bunch of names that match that date of birth will appear. Just choose the name you like and has a higher score.