In that regard, he will is hoping to serve as a lucky charm for the Millers, who follow Tuesday night's game at Luton Town with a pivotal and potentially season-defining fixture at Cardiff City on Saturday.
Whatever happens at Kenilworth Road, the Millers will be in with a chance of staying up if results go their way, with a huge fixture also taking place at Pride Park where Derby County welcome Sheffield Wednesday.
Harding has 'previous' in terms of joyous end-of-season episodes at former club Birmingham, who memorably survived the final day threat of relegation three times in the space of five seasons.
Harding was part of a Blues side who dashed Fulham's automatic promotion hopes at St Andrew's in May, 2018 in a 3-1 success thanks to goals from Lukas Jutkiewicz, Harlee Dean and Che Adams and it is a day which is still lodged in his memory as the Midlanders staved off the drop.
Harding, impressive after coming on for Angus MacDonald in Saturday's 1-1 draw with Blackburn Rovers, said: "My first season breaking through at Birmingham, I was in the thick of it.
"The last game was against Fulham and I started against Ryan Sessegnon who was on fire that year. We needed something and I assisted the first goal and we won 3-1. So, yeah, I've experienced the pressure. That game sticks out massively. What a day. I loved it."
On another huge final-day of action and the Millers taking their fates to a 46th game - he added: "This is what you want to do. Growing up, all I ever wanted to do was play football. To be in tough games in tough situations, it's good, Man. We feel like it's us against the world.
"If we stayed up, it would be at the top. I've played in every game. That level of involvement is massive for me.
"My friends and family have all turned into Rotherham fans. Everywhere I go, everything I do, they support me. I've got a big family, a big support system."