For Kinesis, it seems to be, that AWS organizes its folders on S3 like: "prefix/2019/02/09/13/kinesis-stream-name-2019-02-09-10-02-32-db1db7a9-c484-40d1-b7ec-7651a55e4677"

The date in the path is UTC-time, the date in the file name is the UTC-time of the first received byte in the Kinesis stream for the specific file. This is the default behavior, so it would be nice to implement it in localstack.
zip_file=zip_file, event_source_arn=ddb_event_source_arn, runtime=LAMBDA_RUNTIME_PYTHON27, delete=True)
        # su
        dynamodb.batch_write_item(RequestItems={table_name: [
            {'PutRequest': {'Item': {PARTITION_KEY: {'S': 'testId0'}, 'data': {'S': 'foobar123'}}}},
            {'PutRequest': {'Item': {PARTITION_KEY: {'S': 'testId1'}, 'data': {'S': 'foobar123'}}}},
            {'PutRequest': {'Item': {PARTITION_KEY: {'S': 'testId2'}, 'data': {'S': 'foobar123'}}}}
        ]})
        # su
        dynamodb.batch_write_item(RequestItems={table_name: [
            {'PutRequest': {'Item': {PARTITION_KEY: {'S': 'testId3'}, 'data': {'S': 'foobar123'}}}},
            {'PutRequest': {'Item': {PARTITION_KEY: {'S': 'testId4'}, 'data': {'S': 'foobar123'}}}},
            {'PutRequest': {'Item': {PARTITION_KEY: {'S': 'testId5'}, 'data': {'S': 'foobar123'}}}},
            {'DeleteRequest': {'Key': {PARTITION_KEY: {'S': 'testId0'}}}},
            {'DeleteRequest': {'Key': {PARTITION_KEY: {'S': 'testId1'}}}},
            {'DeleteRequest': {'Key': {PARTITION_KEY: {'S': 'testId2'}}}},
        ]})
        # su
        dynamodb.transact_write_items(TransactItems=[
            {'Put': {'TableName': table_name,
                'Item': {PARTITION_KEY: {'S': 'testId6'}, 'data': {'S': 'foobar123'}}}},
            {'Put': {'TableName': table_name,
                'Item': {PARTITION_KEY: {'S': 'testId7'}, 'data': {'S': 'foobar123'}}}},
            {'Put': {'TableName': table_name,
                'Item': {PARTITION_KEY: {'S': 'testId8'}, 'data': {'S': 'foobar123'}}}},
            {'Delete': {'TableName': table_name, 'Key': {PARTITION_KEY: {'S': 'testId3'}}}},
            {'Delete': {'TableName': table_name, 'Key': {PARTITION_KEY: {'S': 'testId4'}}}},
            {'Delete': {'TableName': table_name, 'Key': {PARTITION_KEY: {'S': 'testId5'}}}},
        ])
        # su
        dynamodb.transact_write_items(TransactItems=[