Not so long ago, most Reformed (Calvinist, including Presbyterian) churches had Communion — Supper — services once a month.
Today, that tradition is changing, with more churches embracing a weekly Supper.
Those churches which have not yet done so say that the frequency of the Supper might diminish its significance to the congregation. Along with this is the rationale that, during the service, congregants will choose to reflect on either the preaching or the Supper but not both. Others say that their church’s tradition has always been for a quarterly or monthly Communion service. All of these are reasonable.