The phrase "normal workday" refers to the typical or usual hours and routine of a person's job. It implies the standard work schedule and tasks that are expected to be performed during a regular working day. Full definition
I don't get to take siestas on normal workdays, so it's a definite luxury for me to get to do so in my downtime. (theeverygirl.com)
Almost any entrepreneur can tell you how often he or she loses track of time during the course of a normal workday. (inc.com)
It may be during part of the normal workday, at night or on the weekend, but basically you get to do something your traditional manager doesn't pay attention to. (canadianbusiness.com)