I did this back in 2010 when I first made my goals to be healthier and lose some weight.
It worked like a charm for me.
I Googled "zig zag calories" and a site popped up that had a calculator into which I typed my variables and it came up with a weekly plan for daily calories. Mine ranged from 900 to 1700 (I'm fairly short and middle-aged, thus the lower numbers). I planned my most vigorous workouts on the higher days and some enjoyable, time-consuming things on the lower ones.
And now that you don't have to be perfect, you can be good.