Fathers rights?

Carleigh • Ella ; 27:1O:15 🎀👑
not about pregnancy but... 
me and my boyfriend recently split up and I'm wondering what rights he has with the baby. She is 4 weeks old, and he works Monday-Friday and Sunday, 4am - 2:30pm. Does he have rights to have her over night, and how many days is he entitled to have her?