Period to file a paternity leave

Dear PAO,

My officemate's wife is currently in her eighth month of pregnancy. From his narrative, it appears to be a delicate situation with numerous hospital scares and frequent doctor visits. Alfred, my officemate, is eager to be present once the baby arrives, seeing it as his way of actively contributing to his spouse's pregnancy journey. He just wants to know if there is a period within which he should apply for a paternity leave considering that we are working in a private company.