Actually, we had to reschedule half of December and January after we thought they were finalised already, so it takes time to work out what to shuffle where and get approvals 
Just like anything in life a lot of things are pretty simple when everything is going smoothly, and they’re not so quick and simple when a wrench gets thrown in.
I know it’s easy from the outside to think everything looks quick and easy, and if it were it would just be done as simply as you think it would be. If it’s not done, it means that when you have the whole picture, it actually wasn’t simple.