What day of the week is the busiest at this airport?

I would say Friday/Monday, due to those days typically because busy at other airports, and because many people from the Navy Base (or even Langley Air Force Base) are PCSing and/or traveling for TDY

In terms of daily flights it may vary somewhat month to month. Let's take a look at how the week of April 8 - April 14 stacks up: Day of week/Departures Monday/76 Tuesday/69 Wednesday/71 Thursday/76 Friday/76 Saturday/57 Sunday/73

Typically, Friday is the day of the week with the most flights