Well, read what you posted more carefully: Drop Shot had a fixed date when "blue" side had to start hostilities.
No.....that is incorrect......from the link I posted.....
a date arbitrarily set for planning.
Note that it doesn't say a date arbitrarily set for an attack, a date was set for planning purposes.
The plan called for defending the Western Hemisphere and Western Europe,
It was a defensive plan, with plans to destroy the Soviet capability to make war with conventional and nuclear bombs. After the USSR's ability to make war was destroyed, the rest of the plan was for a massive counteroffensive to occupy the whole USSR. (No different than the plan for defeating Germany). So you see, it wasn't a First Strike plan, it was a *just in case* plan, also known as a contingency plan. This was planned *just in case* the USSR and the Warsaw Pact attacked Western Europe.
These types of military plans are perfectly reasonable. I expect the USSR had some of these very same types of plans.
Just because these types of plans are in place does not mean that either or both sides are actually planning on initiating warfare.