Hello,
I’ve noticed that I can’t see Fedex and UPS flights anymore. I’ve checked IAD and PHL. None are on schedule (en route or scheduled departures). Same goes for MEM and SDF. I can see handful of flights for the next couple of days.
What’s going on?
I see them on both boards for SDF and MEM.
Keep in mind they have pretty light schedules over the weekend. Maybe 10-20% of weekday ops.
Not only the weekend, but holiday weekend 
I completely forgot that today is President’s Day.
That would explain a lot