This is the new *CloudFormation Template Reference Guide*. Please update your bookmarks and links. For help getting started with CloudFormation, see the [AWS CloudFormation User Guide](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/Welcome.html).

# AWS::ODB::CloudAutonomousVmCluster MaintenanceWindow
<a name="aws-properties-odb-cloudautonomousvmcluster-maintenancewindow"></a>

The scheduling details for the maintenance window. Patching and system updates take place during the maintenance window.

## Syntax
<a name="aws-properties-odb-cloudautonomousvmcluster-maintenancewindow-syntax"></a>

To declare this entity in your CloudFormation template, use the following syntax:

### JSON
<a name="aws-properties-odb-cloudautonomousvmcluster-maintenancewindow-syntax.json"></a>

```
{
  "[DaysOfWeek](#cfn-odb-cloudautonomousvmcluster-maintenancewindow-daysofweek)" : [ String, ... ],
  "[HoursOfDay](#cfn-odb-cloudautonomousvmcluster-maintenancewindow-hoursofday)" : [ Integer, ... ],
  "[LeadTimeInWeeks](#cfn-odb-cloudautonomousvmcluster-maintenancewindow-leadtimeinweeks)" : Integer,
  "[Months](#cfn-odb-cloudautonomousvmcluster-maintenancewindow-months)" : [ String, ... ],
  "[Preference](#cfn-odb-cloudautonomousvmcluster-maintenancewindow-preference)" : String,
  "[WeeksOfMonth](#cfn-odb-cloudautonomousvmcluster-maintenancewindow-weeksofmonth)" : [ Integer, ... ]
}
```

### YAML
<a name="aws-properties-odb-cloudautonomousvmcluster-maintenancewindow-syntax.yaml"></a>

```
  [DaysOfWeek](#cfn-odb-cloudautonomousvmcluster-maintenancewindow-daysofweek): 
    - String
  [HoursOfDay](#cfn-odb-cloudautonomousvmcluster-maintenancewindow-hoursofday): 
    - Integer
  [LeadTimeInWeeks](#cfn-odb-cloudautonomousvmcluster-maintenancewindow-leadtimeinweeks): Integer
  [Months](#cfn-odb-cloudautonomousvmcluster-maintenancewindow-months): 
    - String
  [Preference](#cfn-odb-cloudautonomousvmcluster-maintenancewindow-preference): String
  [WeeksOfMonth](#cfn-odb-cloudautonomousvmcluster-maintenancewindow-weeksofmonth): 
    - Integer
```

## Properties
<a name="aws-properties-odb-cloudautonomousvmcluster-maintenancewindow-properties"></a>

`DaysOfWeek`  <a name="cfn-odb-cloudautonomousvmcluster-maintenancewindow-daysofweek"></a>
The days of the week when maintenance can be performed.  
*Required*: No  
*Type*: Array of String  
*Allowed values*: `MONDAY | TUESDAY | WEDNESDAY | THURSDAY | FRIDAY | SATURDAY | SUNDAY`  
*Update requires*: [Replacement](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)

`HoursOfDay`  <a name="cfn-odb-cloudautonomousvmcluster-maintenancewindow-hoursofday"></a>
The hours of the day when maintenance can be performed.  
*Required*: No  
*Type*: Array of Integer  
*Update requires*: [Replacement](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)

`LeadTimeInWeeks`  <a name="cfn-odb-cloudautonomousvmcluster-maintenancewindow-leadtimeinweeks"></a>
The lead time in weeks before the maintenance window.  
*Required*: No  
*Type*: Integer  
*Minimum*: `1`  
*Maximum*: `4`  
*Update requires*: [Replacement](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)

`Months`  <a name="cfn-odb-cloudautonomousvmcluster-maintenancewindow-months"></a>
The months when maintenance can be performed.  
*Required*: No  
*Type*: Array of String  
*Allowed values*: `JANUARY | FEBRUARY | MARCH | APRIL | MAY | JUNE | JULY | AUGUST | SEPTEMBER | OCTOBER | NOVEMBER | DECEMBER`  
*Update requires*: [Replacement](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)

`Preference`  <a name="cfn-odb-cloudautonomousvmcluster-maintenancewindow-preference"></a>
The preference for the maintenance window scheduling.  
*Required*: No  
*Type*: String  
*Allowed values*: `NO_PREFERENCE | CUSTOM_PREFERENCE`  
*Update requires*: [Replacement](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)

`WeeksOfMonth`  <a name="cfn-odb-cloudautonomousvmcluster-maintenancewindow-weeksofmonth"></a>
The weeks of the month when maintenance can be performed.  
*Required*: No  
*Type*: Array of Integer  
*Update requires*: [Replacement](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)