But really..

Hahahaha, this is nothing. They intentionally 'launch' on weekends and holidays to try and keep cost down all the time.

@Schroedinbug why would that keep cost down?

@iamroot Due to when is best to launch you almost always pay contractors on the launch team overtime.

When you schedule it at an inconvient time fewer people want to be there, so you will have almost only people who absolutely have to be there. One example would be having two people do a job one could do because you are trying to teach the second person.

Launch customers really don't pay for military (no additional cost is incurred by the range), but contractors are usually paid by the hour, and the user (SpaceX) is charged.