I would not have an issue of interviewing a Dad if for instance the Mom works nights and if I've done the thorough pre-interview phone conversation or emailing with all the questions I ask to weed out the people who won't work with me or fit my hours, etc. However, I never conduct interviews during daycare hours and always right after work at 5 or 5:30. I would have a lot of questions for the Dad asking him to bring along the Mom and the child because I always like to meet the whole family at an interview. Be careful. There are a lot of weirdos out there.