https://superuser.com/questions/1886392/what-is-the-cheapest-day-to-book-on-expediahttps://superuser.com/questions/1886392/what-is-the-cheapest-day-to-book-on-expediahttps://superuser.com/questions/1886392/what-is-the-cheapest-day-to-book-on-expediahttps://superuser.com/questions/1886392/what-is-the-cheapest-day-to-book-on-expedia