Show HN: Find the cheapest Amtrak fares for any day (ahhhtrak.com)

I travel a lot between New York, D.C., and Hartford and needed a tool to help me find cheap fares. Amtrak has a tool to search for tickets in a range of days, but not for selecting individual days. So I built Ahhhtrak to help me do that. Hopefully others may find it useful too!