**Example 1: To create an event window with a time range** The following ``create-instance-event-window`` example creates an event window with a time range. You can't also specify the ``cron-expression`` parameter. :: aws ec2 create-instance-event-window \ --region us-east-1 \ --time-range StartWeekDay=monday,StartHour=2,EndWeekDay=wednesday,EndHour=8 \ --tag-specifications "ResourceType=instance-event-window,Tags=[{Key=K1,Value=V1}]" \ --name myEventWindowName Output:: { "InstanceEventWindow": { "InstanceEventWindowId": "iew-0abcdef1234567890", "TimeRanges": [ { "StartWeekDay": "monday", "StartHour": 2, "EndWeekDay": "wednesday", "EndHour": 8 } ], "Name": "myEventWindowName", "State": "creating", "Tags": [ { "Key": "K1", "Value": "V1" } ] } } For event window constraints, see `Considerations <https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/event-windows.html#event-windows-considerations>`__ in the Scheduled Events section of the *Amazon EC2 User Guide*. **Example 2: To create an event window with a cron expression** The following ``create-instance-event-window`` example creates an event window with a cron expression. You can't also specify the ``time-range`` parameter. :: aws ec2 create-instance-event-window \ --region us-east-1 \ --cron-expression "* 21-23 * * 2,3" \ --tag-specifications "ResourceType=instance-event-window,Tags=[{Key=K1,Value=V1}]" \ --name myEventWindowName Output:: { "InstanceEventWindow": { "InstanceEventWindowId": "iew-0abcdef1234567890", "Name": "myEventWindowName", "CronExpression": "* 21-23 * * 2,3", "State": "creating", "Tags": [ { "Key": "K1", "Value": "V1" } ] } } For event window constraints, see `Considerations <https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/event-windows.html#event-windows-considerations>`__ in the Scheduled Events section of the *Amazon EC2 User Guide*.