# Transition
<a name="API_control_Transition"></a>

Specifies when an object transitions to a specified storage class. For more information about Amazon S3 Lifecycle configuration rules, see [ Transitioning objects using Amazon S3 Lifecycle](https://docs.aws.amazon.com/AmazonS3/latest/dev/lifecycle-transition-general-considerations.html) in the *Amazon S3 User Guide*.

## Contents
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 ** Date **   <a name="AmazonS3-Type-control_Transition-Date"></a>
Indicates when objects are transitioned to the specified storage class. The date value must be in ISO 8601 format. The time is always midnight UTC.  
Type: Timestamp  
Required: No

 ** Days **   <a name="AmazonS3-Type-control_Transition-Days"></a>
Indicates the number of days after creation when objects are transitioned to the specified storage class. The value must be a positive integer.  
Type: Integer  
Required: No

 ** StorageClass **   <a name="AmazonS3-Type-control_Transition-StorageClass"></a>
The storage class to which you want the object to transition.  
Type: String  
Valid Values: `GLACIER | STANDARD_IA | ONEZONE_IA | INTELLIGENT_TIERING | DEEP_ARCHIVE`   
Required: No

## See Also
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For more information about using this API in one of the language-specific AWS SDKs, see the following:
+  [AWS SDK for C\$1\$1](https://docs.aws.amazon.com/goto/SdkForCpp/s3control-2018-08-20/Transition) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/s3control-2018-08-20/Transition) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/s3control-2018-08-20/Transition)