https://techcommunity.microsoft.com/idea/azurevirtualdesktop/what-is-the-cheapest-day-to-buy-flights-on–/4400172
https://techcommunity.microsoft.com/idea/azurevirtualdesktop/what-is-the-cheapest-day-to-buy-flights-on-%F0%9D%94%B8%F0%9D%95%9E%F0%9D%95%96%F0%9D%95%A3%F0%9D%95%9A%F0%9D%95%94%F0%9D%95%92%F0%9D%95%9F-%F0%9D%94%B8%F0%9D%95%9A%F0%9D%95%A3%F0%9D%95%9D%F0%9D%95%9A%F0%9D%95%9F%F0%9D%95%96%F0%9D%95%A4/4400172