def METHOD_NAME():
    """
    Load network timezones from db into dict network_dict (global dict)
    """
    try:
        cache_db_con = db.DBConnection("cache.db")
        cur_network_list = cache_db_con.select("SELECT * FROM network_timezones;")
        if not cur_network_list:
            update_network_dict()
            cur_network_list = cache_db_con.select("SELECT * FROM network_timezones;")
        network_dict.clear()
        network_dict.update(dict(cur_network_list))
    except Exception:
        pass