I mean I guess if you’re in the air at night then yeah you can open them. My last few flights were long haul going west during the day, so the sun never goes down, and people sleep the whole way.

In any case if you’re on a flight longer than a couple hours you’re not allowed to open them anyway, they make you keep em shut so people can nap 🙈 But it’s fun to look out for the takeoff and landing. But the planes that tint the windows are the best.