function createTimeDrivenTriggers() {

ScriptApp.newTrigger('myFunction')

.timeBased()

.everyDays(1)

.atHour(13)

.create();

var timeZone = Session.getScriptTimeZone();

 var timestamp_format = "mm/dd/yyyy";

 var updateColName = "Updated";

 var timeStampColName = "Timestamp";

 var ss = SpreadsheetApp.getActiveSpreadsheet();