title: How can I set AWS schedule expression to self trigger only once at specific time,date,month,year without repeating?
body: <p>How can I set AWS schedule expression to self trigger cloud event only once at specific time,date,month,year without repeating?</p>
  
  <p>Eg: self trigger cloud event at 7.30am on 2018-10-12 only once and never run again</p>
  
  <p>I tried this format "Cron expression: 30 7 12 10 ? 2018" but it did not self trigger, Any idea on AWS schedule expression format to achieve this requirement?</p>
  
  <p>Thanks In Advance,
  Sundar</p>