When to log?

I am curious what everyone else thinks. Because of my schedule (mainly) and my SO schedule, we usually cannot have sex until night time. We do not currently live together and both have kids. So it is usually after we both get our kids to bed. Sometimes that means we don't have sex til 1230 or 1am. I usually just log it as whatever day comes up when I open the app and hit "today" but what if it's actually Tuesday and not Monday? (For example) Should I be actually logging it on the calendar day?