A chance to tour the stadium, meet the players and get some autographs, the open day was always something to look forward to.
The ground would be packed out with eager crowds every year with families who enjoyed the funfair and the chance to meet their footballing heroes.
Have a look through and see if you can spot any familiar faces.
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. Richie Barker
Stags skipper and fan's favourite Richie Barker signs autographs for fans at the open day held at Field Mill in 2006 Photo: Roger Grayson
. 2009
Stags Captain Ryan Williams signs the shirt of four year old Coran Woodham at Field Mill. Photo: Roger Grayson
. 2009
Nine month old Stags fan Finley Arnold tries out the Field Mill pitch Photo: Roger Grayson
1. 2009
Stags Captain Ryan Williams signs the shirt of four year old Coran Woodham at Field Mill. Photo: Roger Grayson
2. 2009
Nine month old Stags fan Finley Arnold tries out the Field Mill pitch Photo: Roger Grayson
3. 2009
Stags players and fans at Field Mill - can you spot yourself? Photo: Roger Grayson
4. 2009
Jonathan D'Laryea pictured with Stags fan Dave Palfreman, from Leicester, who is wearing a Stags shirt from the 1960's at Field Mill during Sunday's Open Day. Dave first visited Field Mill in 1946 at the age of eight. Photo: Roger Grayson