Day, 35, will be between the posts at Broadhall Way when Alan Pardew's Newcastle side travel to Hertfordshire on the back of putting five past Barclays Premier League rivals West Ham on Wednesday.
But the former QPR, Crystal Palace and Watford keeper is not concerned and has instead turned his attention toward causing another magic moment in the famous competition which holds a special part in his heart.
He told Press Association Sport: "I'm a Tottenham fan myself and, growing up, my first real memory was the 1981 FA Cup final. Ricky Villa's goal stands out as a memory for me and the FA Cup was the only real live football you got to see so it's always been special.
"It is what makes this country special. It gets watched around the world and it's probably the best cup to play in. We are trying to keep a level head. We'll respect Newcastle as a team but we won't do anything different.
"In years to come I am sure we will look back at this game. At the end of the day we are playing against players who we all watch every Saturday evening on Match of the Day. It's brilliant to be on the same pitch as these guys but we have earnt that right and we can't forget that."
Source: PA
Source: PA