https://forum.netgate.com/topic/191916/%D0%B2%CF%83%CF%83%D0%BA-%CE%B7%CF%83%CF%89-what-is-the-cheapest-day-to-book-on-jetblue
https://forum.netgate.com/topic/191916/%D0%B2%CF%83%CF%83%D0%BA-%CE%B7%CF%83%CF%89-what-is-the-cheapest-day-to-book-on-jetblue