def get_creation_date_tags(url, domain, as_dicts=False):
    creation_date_tags = [
        mementoweb_api_tags(url),
        get_whois_tags(domain),
    ]
    creation_date_tags = sorted(
        sum(creation_date_tags, []),
        key=lambda x: x.date
    )
    if not as_dicts:
        return creation_date_tags
    return [
        item._as_dict()
        for item in creation_date_tags
    ]