In the 2024 Sprint races, Free Practice 1 is held as normal on Friday, but then the Sprint Shootout qualifying session takes place.
Parc ferme then kicks in for the Sprint which takes place on Saturday morning, before parc ferme is then reopened ahead of qualifying on Saturday afternoon with the main race on Sunday as normal.
Sounds interesting. I'm glad they're experimenting with the format. I wonder if this will result in more creative/unique setups now that the teams don't have to make a single compromised setup for the sprint and GP.