It's a trial run. We are hoping to ramp up the number of events per year and want to expose as many people as possible to Scenarios.
There will be plenty of Saturday Afternoon Scenarios this year, there might be more Satruday Evening Events, there might even be weeknight events one of these days.
Heck we might even run one on Saturday Mornings US time at some future time. Anyone remember the AirWarrior scenario which started at 7am Eastern on a Saturday and ran 12 hours?