That you are either far to young to know much history, or are old enough and either never knew any, or have forgotten what you once knew. So, which is it?
Historical events are just that.
In this day and age, information travels at the speed of FREEP.
One cannot announce that they have big news and then just put it off for a week.
Too much time for the other side to work the opposite spin.
Why give them any advantage?
That, in a nutshell, is my point.