afternoon guru
A person who rises, arrives, or acts after the "Early Bird". A person who is habitually active or wakeful in the Afternoon. Never on time if something is scheduled in the morning, always staying at home when invited to a night-time event, and sleeps for more then 8 hours a night. Typically up between the hours of 11am-9pm.
"He's an afternoon guru! He will never make it to the meeting by 8!" "Is Katie coming to the bar tonight? No, she an afternoon guru. I wouldn't count on it."