FYI: The channels themselves aren't scheduled to be off the air tonight. Dish puts "off air" on channels that are on transponders they plan to move around. That way people will not complain as much when the channel blips off the air as the transponder changes/encoder maintenance happens. The channels are rarely off the air for more than a few minutes, but they give themselves a wide 2-4 hour window to work out bugs if any show up.