Sundays mean that Monday is coming. So you try to squeeze in as much as you can out of the weekend.
Sort of like finding out that you've been slacking your entire life, and realize that you need to get out of all your comfort zones before it traps you into the inescapable void of your typical. Any drastic action should still be weighed against the occasion, but with so much to lose, why drown in the details? Everything to venture, everything to gain.