The phrase "day afternoon" simply means the part of the day that comes after noon and before evening. It typically refers to the period between 12:00 PM and 6:00 PM. Full definition
After 5 - 7 days the afternoon nap will stretch out and the baby will be well adjusted to getting adequate rest throughout the day. (healthyhappysleep.com)
Once Sandy had completed her exams online, she was set up by her Externship Coordinator to train with Mentor Trainer Sandy Kowalski of Dog Day Afternoon in Leesburg, Virginia. (animalbehaviorcollege.com)