Traditionally the week of prayer is celebrated between 18-25 January, between the feasts of St Peter and St Paul. In the southern hemisphere, where January is a vacation time, churches often find other days to celebrate it, for example around Pentecost, which is also a symbolic date for unity.
The Biblical Text for 2016 is 1 Peter 2:9-10: But you are a chosen race, a royal priesthood, a holy nation, God’s own people, in order that you may proclaim the mighty acts of him who called you out of darkness into his marvelous light. Once you were not a people, but now you are God’s people; once you had not received mercy, but now you have received mercy.
The text is jointly published by the Pontifical Council for Promoting Christian Unity and the World Council of Churches, through the WCC’s Commission on Faith and Order, which also accompanies the entire production process of the text. The final material is sent to WCC member churches and Roman Catholic episcopal conferences, and they are invited to translate the text and contextualize or adapt it for their own use.