The reason cited for the change was to add one more day to the launch window, from two to three days.

You may not understand this, but to get where you're going requires a specific launch window.

We'll sit and watch - until our launch window opens.

There were six good launch windows between now and Saturday.

They were sent at the next launch window, and reached the planet in 1969.

But the launch window for a return to Earth was still two weeks away, so they would have remained here regardless.

Yeah, maybe, we miss the original launch window, but we're okay.

When the issues were addressed, not enough time remained in the launch window.

Our launch window does not open until twenty-six days from now.

Still nice to see an official launch window for it.