https://support.communitybrands.com/hc/en-us/community/posts/30722955729805--Best-Day-OTA-%F0%9D%9F%AD-%F0%9D%9F%B4%F0%9D%9F%B2%F0%9D%9F%B2-%F0%9D%9F%B4%F0%9D%9F%AF%F0%9D%9F%B4-%F0%9D%9F%B0%F0%9D%9F%B2%F0%9D%9F%AD%F0%9D%9F%AC-What-is-the-cheapest-day-of-the-week-to-buy-Amtrak-tickets