function myFunction() {
  var d = new Date();
  var currentTime = d.toLocaleTimeString(); // "12:35 PM", for instance
}

function archiveInbox() {
var threads = GmailApp.search('label:inbox is:older_than:new Date()');
  for (var i = 0; i < threads.length; i++) {
    threads[i].moveToTrash();
}
}