Past pupils and staff of St Matthew's Collegiate and Rathkeale College have been called on to help celebrate the schools' 100th and 50th anniversaries respectively next year.
Registrations open this week for The Big Weekend on March 21 and 23, which will feature activities and memorials to reconnect old school friends, teachers, staff and supporters of both schools.
The schools' respective programmes include cocktail functions, special assemblies, picnics, lunches, school tours, sports events and chapel services.
The main event will be a combined marquee ball for 800 people at St Matthew's on the Saturday night. Both schools are producing commemorative books.
Enthusiastic organising committees, with connections to both schools and the old boys' and old girls' associations, have been working for more than a year to ensure the commemorations are a success.