A day, of course of much significance to us Pastafarians (followers of the Church of the Flying Spaghetti Monster).
Or in other words,
Lift the skin up, and put into the bunt the slack of the clews (not too taut), the leech and foot-rope, and body of the sail; being careful not to let it get forward under or hang down abaft. Then haul your bunt well up on the yard, smoothing the skin and bringing it down well abaft, and make fast the bunt gasket round the mast, and the jigger, if there be one, to the tie. (Dana, R. 1844)