what jesus don't know won't hurt him
Saturday was the day Jesus chilled out in the tomb. Easter was gonna be a big deal, so he rested up. That means Jesus is not around, and as I understand it, moral law is pretty much suspended that day. Do what you like. What Jesus don't know won't hurt him.
Churches seem to feel the same way. You can't get married on Holy Saturday, or have a funeral that day. It's the Pope's way of making sure everyone has the day off, and can do what they like. Even the altar in church is stripped bare, as if the vestments themselves are taking a day off. We've all left early when the boss is on vacation, so why should a tabernacle be any different?
It's important not to abuse the privilege. If your parents leave for the weekend and you throw a party, you better clean things up before they return. In the same way, make sure whatever sinful debauchery you engage in on Holy Saturday is out of your system by Sunday, or else Jesus is going to be pissed. Jesus thinks you're mature enough that he can spend one single Saturday away, so don't violate His trust and ruin it for everyone else. Even three betrayals of the Lord before the cock crows are OK - provided the betrayals don't get out of hand and stretch into early Sunday morning.
So use the Lord's name in vain, dishonor your parents, and covet everything you see today. Who's gonna say anything? But when the clock strikes twelve, your sins turn back into pumpkins, so clean up that language before it's time to hunt eggs. I'm looking at you, Simon Peter.