What is the cheapest day to buy Amtrak tickets?

support.google.com

https://support.google.com/admanager/thread/322866779?hl=en&sjid=2458935760610983075-AP

support.google.com

https://support.google.com/admanager/thread/322866779?hl=en&sjid=2458935760610983075-AP

tidal.com

https://tidal.com/browse/playlist/beda61f8-84e9-4f07-81b7-3fb7f1ba023b