This worked for me
1st step: SugarCube.State.active.variables.date[0] = new Date(2000,0,1) (Year, Month(0-Jan, 1-Feb, etc.), Date)
2nd: SugarCube.Engine.show() for changes to take effect
I tried to rely on my "knowledge" of a language mostly because it will be too much to ask anyone for help with game they may not like. So my plan is to see if there gonna be volunteers before the next update.