http://ec2.{region}.amazonaws.com/#Action=ModifyInstanceEventWindow<p>Modifies the specified event window.</p> <p>You can define either a set of time ranges or a cron expression when modifying the event window, but not both.</p> <p>To modify the targets associated with the event window, use the <a>AssociateInstanceEventWindow</a> and <a>DisassociateInstanceEventWindow</a> API.</p> <p>If Amazon Web Services has already scheduled an event, modifying an event window won't change the time of the scheduled event.</p> <p>For more information, see <a href="https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/event-windows.html">Define event windows for scheduled events</a> in the <i>Amazon EC2 User Guide</i>.</p>
Checks whether you have the required permissions for the action, without actually making the request, and provides an error response. If you have the required permissions, the error response is <code>DryRunOperation</code>. Otherwise, it is <code>UnauthorizedOperation</code>.
The name of the event window.
The ID of the event window.
The time ranges of the event window.
<p>The cron expression of the event window, for example, <code>* 0-4,20-23 * * 1,5</code>.</p> <p>Constraints:</p> <ul> <li> <p>Only hour and day of the week values are supported.</p> </li> <li> <p>For day of the week values, you can specify either integers <code>0</code> through <code>6</code>, or alternative single values <code>SUN</code> through <code>SAT</code>.</p> </li> <li> <p>The minute, month, and year must be specified by <code>*</code>.</p> </li> <li> <p>The hour value must be one or a multiple range, for example, <code>0-4</code> or <code>0-4,20-23</code>.</p> </li> <li> <p>Each hour range must be >= 2 hours, for example, <code>0-2</code> or <code>20-23</code>.</p> </li> <li> <p>The event window must be >= 4 hours. The combined total time ranges in the event window must be >= 4 hours.</p> </li> </ul> <p>For more information about cron expressions, see <a href="https://en.wikipedia.org/wiki/Cron">cron</a> on the <i>Wikipedia website</i>.</p>
{
"success": true,
"data": {
"id": "abc123",
"created_at": "2025-01-01T00:00:00Z"
}
}{
"success": false,
"error": {
"code": "VALIDATION_ERROR",
"message": "Invalid request parameters"
}
}1curl --request GET \2 --url 'http://ec2.{region}.amazonaws.com/#Action=ModifyInstanceEventWindow' \3 --header 'accept: application/json' \4 --header 'content-type: application/json'1{2 "success": true,3 "data": {4 "id": "abc123",5 "created_at": "2025-01-01T00:00:00Z"6 }7}http://ec2.{region}.amazonaws.com/#Action=ModifyInstanceEventWindow<p>Modifies the specified event window.</p> <p>You can define either a set of time ranges or a cron expression when modifying the event window, but not both.</p> <p>To modify the targets associated with the event window, use the <a>AssociateInstanceEventWindow</a> and <a>DisassociateInstanceEventWindow</a> API.</p> <p>If Amazon Web Services has already scheduled an event, modifying an event window won't change the time of the scheduled event.</p> <p>For more information, see <a href="https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/event-windows.html">Define event windows for scheduled events</a> in the <i>Amazon EC2 User Guide</i>.</p>
Checks whether you have the required permissions for the action, without actually making the request, and provides an error response. If you have the required permissions, the error response is <code>DryRunOperation</code>. Otherwise, it is <code>UnauthorizedOperation</code>.
The name of the event window.
The ID of the event window.
The time ranges of the event window.
<p>The cron expression of the event window, for example, <code>* 0-4,20-23 * * 1,5</code>.</p> <p>Constraints:</p> <ul> <li> <p>Only hour and day of the week values are supported.</p> </li> <li> <p>For day of the week values, you can specify either integers <code>0</code> through <code>6</code>, or alternative single values <code>SUN</code> through <code>SAT</code>.</p> </li> <li> <p>The minute, month, and year must be specified by <code>*</code>.</p> </li> <li> <p>The hour value must be one or a multiple range, for example, <code>0-4</code> or <code>0-4,20-23</code>.</p> </li> <li> <p>Each hour range must be >= 2 hours, for example, <code>0-2</code> or <code>20-23</code>.</p> </li> <li> <p>The event window must be >= 4 hours. The combined total time ranges in the event window must be >= 4 hours.</p> </li> </ul> <p>For more information about cron expressions, see <a href="https://en.wikipedia.org/wiki/Cron">cron</a> on the <i>Wikipedia website</i>.</p>
{
"success": true,
"data": {
"id": "abc123",
"created_at": "2025-01-01T00:00:00Z"
}
}{
"success": false,
"error": {
"code": "VALIDATION_ERROR",
"message": "Invalid request parameters"
}
}1curl --request GET \2 --url 'http://ec2.{region}.amazonaws.com/#Action=ModifyInstanceEventWindow' \3 --header 'accept: application/json' \4 --header 'content-type: application/json'1{2 "success": true,3 "data": {4 "id": "abc123",5 "created_at": "2025-01-01T00:00:00Z"6 }7}