As well as elected members, several front-line staff attended the ceremony to mark the day.
The pupils shared the important work they have been doing over the school year.
The event celebrated the conclusion of the improvement works at Loggerheads Country Park.
Enhancements in key areas are bringing a refreshed look and upgraded facilities to the Prestatyn primary school.
This year's 2026 Summer Reading Challenge launches in local libraries on Saturday, 4 July.
To commemorate both days, a special armed forces flag will fly outside County Hall.