The government's view is that the best time to announce bad news news that it doesn't want the public to dwell on is late on a Friday when it will wind up in the Saturday papers which if you were readers then the week day editions. A holiday weekend is even better.
And of course Marc Cherry heightens it and makes it hilarious. But there's so many universal themes in the show and he made it so funny. We knew he was onto something if he could keep it up and thankfully he did.