Make Text Variables 1 Year In Advance (Expiry Date)

Make a custom text variable called "oneyeardate". Then, run this script when you open the doc:

var d = new Date();
var day = ("0" + d.getDate()).slice(0,2);
var month = ("0" + d.getMonth() + 1).slice(0,2);
var nextyear = d.setFullYear(d.getFullYear() + 1);
app.activeDocument.textVariables.itemByName("oneyeardate").customTextVariablePreferences.contents = month + "-" + day + "-" + nextyear;