It's already afternoon and you're using future tense, so I'm guessing that your qualifying flight is late today. Hence I would expect miles for the flight to post tomorrow and your status to be updated the following day, Sunday. It will be effective at the time it shows in your DL account.

In the past, people apparently needed to remove and re-enter the FF number on existing bookings when status increased, but more recent reports have indicated that this isn't necessary. Still, if you'll be in the middle of a short RT, I wouldn't count on upgrades being prioritized at the higher status right away.