It is an estimate, at best.
And I hope for your sake that your car won't be built on the 15th.
Why do you say that? What difference does it make if the vehicle is built on the 15th of April or any other day after the 15th? Most of these Challengers are built with quality issues to begin with no matter which day that they are built. Do you think that Tyrone, Bubba and Antwon the assembly line employees will drink a lot before the plant reopens causing them to be hung over and not build the car correctly?