public void setCreationDate(Date creationDate) {
        this.creationDate = creationDate;
    }
For internal use only.
Sets the bucket's creation date in S3. This should only be used
internally by Amazon Web Services Java client methods that retrieve information directly
from Amazon S3.

@param creationDate
         The bucket's creation date.
aws-java-sdk-s3/src/main/java/com/amazonaws/services/s3/model/Bucket.java