The phrase "course of the day" refers to the natural progression or sequence of events that occur during a particular time period, usually referring to a 24-hour cycle. Full definition
Use your creativity and sneak in fitness with young children during the normal course of the day. (parentingsquad.com)
But, before you right them off completely, it's important to remember that your body uses amino acids over the total course of the day. (blog.nkdnutrition.com)
What does that mean for your final course of the day? (styleathome.com)