public void setCreationDate(java.util.Date creationDate) {
        this.creationDate = creationDate;
    }
<p>
The date and time when the item was created. Amazon Cognito returns this timestamp in UNIX epoch time format.
Your SDK might render the output in a human-readable format like ISO 8601 or a Java <code>Date</code> object.
</p>

@param creationDate
       The date and time when the item was created. Amazon Cognito returns this timestamp in UNIX epoch time
       format. Your SDK might render the output in a human-readable format like ISO 8601 or a Java
       <code>Date</code> object.
aws-java-sdk-cognitoidp/src/main/java/com/amazonaws/services/cognitoidp/model/UserPoolType.java