This latest collection of pictures from the Mid Ulster Mail archives show the pupils all dressed up for the event and it certainly looked like a great night. Check out the photos and see who you recognise.
If you fancy seeing more pictures from a big night out in years gone by, check this out too: 13 pictures to turn the clock back to a great night out in Mid Ulster in 2007
9. Stylish night out
Ryan Wilson and Stacey Clarke who attended the Cookstown High School formal held in the Glenavon House Hotel in 2006. Photo: Simon Robinson
10. Getting together at the formal
Jenifer, Claire , Rachel, Laura, Louise and Ryan who were in attendance at Cookstown High School formal in 2006. Photo: Simon Robinson
11. Formal night out
Enjoying the Cookstown High School formal back in 2006. Photo: Simon Robinson
12. Friends together
Enjoying the Cookstown High School formal in the Glenavon House Hotel. Photo: Simon Robinson