There is no single calendar for the various churches making up the Anglican Communion; each makes its own calendar suitable for its local situation. As a result, the calendar here contains a number of figures important in the history of the church in the United States. Calendars in different provinces will focus on figures more important to those different countries. Different provinces often borrow important figures from each other's calendars as the international importance of different figures become more prominent. In this way the calendar of the Episcopal Church in the United States has importance beyond just the immediate purpose of supporting the liturgy of the American church. It is one of the key sources of the calendar for the international daily office "Oremus."