In fact, maybe we are looking at this all wrong. Maybe for Pi Day we should be limiting our selves to a mere half circle's worth of pie each rather than Tau Day (6/28) when we binge on an entire pie. So, while gluttony is fun and all, it may be better for us to stick to our demi-pie today? Nah.. that doesn't make sense... just eat as much as you want.
However you celebrate, have a great day!