Script to Calculate the Difference Between Dates in Days

// The following defines a variable to take any date in any format from a variable field Base_Date in this case), and turn it into a proper date string for conversion

var dateString = String(label.fields.field.(@name == 'Base_Date').@data);
var bd = new Date(dateString);

// The following defines a variable that takes the new date variable (bd) and converts it into milliseconds

var bd1 = Date.parse(bd);

// The following defines a variable to take any date in any format from a variable field Entered_Date in this case), and turn it into a proper date string for conversion

var dateString = String(label.fields.field.(@name == 'Entered_Date').@data);
var ed = new Date(dateString);

// The following defines a variable that takes the new date variable (ed) and converts it into milliseconds

var ed1 = Date.parse(ed);

//The following defines a variable that calculates the difference between the current date and the entered date

var ddms = ed-bd

//The following defines a variable that calculates the date difference in days by taking the date difference in milliseconds, dividing by 86400000 (the amount of milliseconds per day), then rounding the value

var dd = Math.round(ddms/86400000)

//The following formulates the printed Date Difference

label.fields.field.(@name == 'Date_Difference').@data = dd;