Hear ye a statement of the obvious

Let it be known that to fill one's weekend with Fest, sans unday, tis folly. Where is the time to rebound from mild sunstroke? To bounce back from the ill-timed (double) round of crawfish sacks n' beignets? To repent over-texting one's coordinates? Needless to say, a punday is of no help in these matters. Only an unday will do (and a Corpse Reviver No. 1.)