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# AWS::ApplicationSignals::ServiceLevelObjective CalendarInterval
<a name="aws-properties-applicationsignals-servicelevelobjective-calendarinterval"></a>

If the interval for this service level objective is a calendar interval, this structure contains the interval specifications.

## Syntax
<a name="aws-properties-applicationsignals-servicelevelobjective-calendarinterval-syntax"></a>

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

### JSON
<a name="aws-properties-applicationsignals-servicelevelobjective-calendarinterval-syntax.json"></a>

```
{
  "[Duration](#cfn-applicationsignals-servicelevelobjective-calendarinterval-duration)" : Integer,
  "[DurationUnit](#cfn-applicationsignals-servicelevelobjective-calendarinterval-durationunit)" : String,
  "[StartTime](#cfn-applicationsignals-servicelevelobjective-calendarinterval-starttime)" : Integer
}
```

### YAML
<a name="aws-properties-applicationsignals-servicelevelobjective-calendarinterval-syntax.yaml"></a>

```
  [Duration](#cfn-applicationsignals-servicelevelobjective-calendarinterval-duration): Integer
  [DurationUnit](#cfn-applicationsignals-servicelevelobjective-calendarinterval-durationunit): String
  [StartTime](#cfn-applicationsignals-servicelevelobjective-calendarinterval-starttime): Integer
```

## Properties
<a name="aws-properties-applicationsignals-servicelevelobjective-calendarinterval-properties"></a>

`Duration`  <a name="cfn-applicationsignals-servicelevelobjective-calendarinterval-duration"></a>
Specifies the duration of each calendar interval. For example, if `Duration` is `1` and `DurationUnit` is `MONTH`, each interval is one month, aligned with the calendar.  
*Required*: Yes  
*Type*: Integer  
*Minimum*: `1`  
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)

`DurationUnit`  <a name="cfn-applicationsignals-servicelevelobjective-calendarinterval-durationunit"></a>
Specifies the calendar interval unit.  
*Required*: Yes  
*Type*: String  
*Allowed values*: `MINUTE | HOUR | DAY | MONTH`  
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)

`StartTime`  <a name="cfn-applicationsignals-servicelevelobjective-calendarinterval-starttime"></a>
The date and time when you want the first interval to start. Be sure to choose a time that configures the intervals the way that you want. For example, if you want weekly intervals starting on Mondays at 6 a.m., be sure to specify a start time that is a Monday at 6 a.m.  
When used in a raw HTTP Query API, it is formatted as be epoch time in seconds. For example: `1698778057`  
As soon as one calendar interval ends, another automatically begins.  
*Required*: Yes  
*Type*: Integer  
*Minimum*: `946684800`  
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)