The Commission on Faith and Order of the World Council of Churches
The search for unity: throughout the year
The traditional period in the northern hemisphere for the Week of Prayer for Christian Unity is 18-25 January. Those dates were proposed in 1908 by Paul Wattson to cover the days between the feasts of St Peter and St Paul, and therefore have a symbolic significance. In the southern hemisphere where January is a vacation time churches often find other days to celebrate the week of prayer, for example around Pentecost (which was suggested by the Faith and Order movement in 1926), which is also a symbolic date for the unity of the church.