--- AWSTemplateFormatVersion: "2010-09-09" Resources: MyScheduledRule1: Type: AWS::Events::Rule Properties: ScheduleExpression: "daily" # has to be cron() or rate() MyScheduledRule2: Type: AWS::Events::Rule Properties: ScheduleExpression: "cron()" # Empty cron MyScheduledRule3: Type: AWS::Events::Rule Properties: ScheduleExpression: "rate()" # Empty rate MyScheduledRule4: Type: AWS::Events::Rule Properties: ScheduleExpression: "rate(5)" # Not enough values MyScheduledRule5: Type: AWS::Events::Rule Properties: ScheduleExpression: "rate(5 minutes daily)" # Too many values MyScheduledRule6: Type: AWS::Events::Rule Properties: ScheduleExpression: "rate(five minutes)" # Value has to be a digit MyScheduledRule7: Type: AWS::Events::Rule Properties: ScheduleExpression: "cron(0 */1 * * WED)" # Not enough values MyScheduledRule8: Type: AWS::Events::Rule Properties: ScheduleExpression: "cron(* 1 * * * *)" # specify the Day-of-month and Day-of-week fields in the same cron expression