Do you think that people who were around to experience those events knew they were living through the day a war started? Do you think folks living in Ancient Rome knew they were enduring the total collapse of an empire?
My point. The war has already started. A date will be agreed upon for when it started if the forces of evil aren't defeated, soon.
In one sense you are correct for we are in the early stages of the coming Social War. In short we are drifting into open conflict.