Archive completed Reminders greater than 7 days old

gistfile1.txt

// days: specifies the number of days that a reminder will remain marked as complete before it is moved to the "Completed Archive" list.
let days = 7
let today = new Date()
let arch = await Calendar.forRemindersByTitle("Completed Archive")
let listsToClear = await Calendar.forReminders()

for ( var j = 0; j < listsToClear.length; j++ ) {
  let cal = listsToClear[j]
  let reminders = await Reminder.allCompleted( [cal] )

  for( var i = 0; i < reminders.length; i++ ) {
    let reminder = reminders[i]
    console.log( reminder.title )

    if ((today - reminder.completionDate)/(1000 * 3600 * 24) > days ) {
    reminder.calendar = arch
    reminder.isCompleted = 0
    reminder.save() 
    }
  }
}
Script.complete()