def _json_container_dates(containers):
    """
    Moves container "status date" to a JSON friendly value.
    Unit tested: test__json_container_dates

    :param containers: The containers found from docker ps.
    :type containers: list
    :returns: The containers found from docker ps, with JSON friendly dates.
    :rtype: list
    """
    clean_containers = []
    for container in containers:
        tmp_container = container
        tmp_container["status_date"] = str(tmp_container["status_date"])
        tmp_container["created_date"] = str(tmp_container["created_date"])
        clean_containers.append(tmp_container)

    return clean_containers