Did it get delayed? YouTube channel now says going live in another 2 hours
"The first test flight of Falcon Heavy is now targeted for Tuesday, Feb. 6th at 3:05 PM ET from Launch Complex 39A at Kennedy Space Center in Florida. Teams are watching upper level wind shear and will continue to update as information becomes available."
It's currently delayed until about an hour before the launch window closes, and they are hoping for the winds to die down. looks unlikely that they will launch today.
EDIT: nevermind fuel is being loaded and the "holy mouse click" has happened.
When is the next window?
Tomorrow, same times (13:30-16:00 EST, I believe, I'm in the UK, so it's 18:30-21:00, that I do know!)
They're filling it with rocket fuel, so I think there's a pretty good chance of a launch.