Q: We have two churches in our parish with three Sunday masses, two at one Church and the other at the other Church. Both of our dedication days fall in ordinary time so can be moved to the weekend masses. As we are one parish do I offer the dedication masses just in the church of the dedication or at all masses at the weekend as the parish is one?
A: The solemnity applies only to the church with the title it received at its dedication. The day may be observed as a feast at the other church.
And whatever the title of that other church was at the time of its dedication REMAINS its title and governs a proper solemnity in that church, even though the name of the parish has changed. But that would not bounce back into a feast at the first church since it has no connection to that name.