https://support.withings.com/hc/en-us/community/posts/31897632192017-What-is-the-Cheapest-Day-to-Fly-on-%F0%9D%90%B8%F0%9D%93%8D%F0%9D%93%85%F0%9D%91%92%F0%9D%92%B9%F0%9D%92%BE%F0%9D%92%B6
https://support.withings.com/hc/en-us/community/posts/31897632192017-What-is-the-Cheapest-Day-to-Fly-on-%F0%9D%90%B8%F0%9D%93%8D%F0%9D%93%85%F0%9D%91%92%F0%9D%92%B9%F0%9D%92%BE%F0%9D%92%B6