https://community.ring.com/conversations/ring-device-tips/what-is-the-cheapest-day-to-buy-air-france-tickets-afpolicy/67e911b134497d30c410a654
https://support.google.com/edu/classroom/thread/334656284/what-day-of-the-week-are-%F0%9D%98%BCmerican-%F0%9D%98%BC%F0%9D%99%84%F0%9D%99%8D%F0%9D%99%87%F0%9D%99%84%F0%9D%99%89%F0%9D%99%80-flights-cheapest
https://travel.stackexchange.com/questions/194452/faflying-worldwhat-is-the-cheapest-day-to-buy-frontier-tickets
