Traditionally celebrated between 18 and 25 January (in the northern hemisphere) or at Pentecost (in the southern hemisphere), the Week of Prayer for Christian Unity mobilises countless congregations and parishes around the world.
As Poland prepares to host the European Football Championship in 2012, Christians in the country have put the meaning of "victory" and "defeat" at the centre of their reflections for the Week of Prayer for Christian Unity that will be celebrated earlier in the year.
Today the organised ecumenical movement among Christians, seeking common witness and social justice, is seen by many as a failing, lost or irrelevant cause, says Keith Clements. But in a divided world, the case for a genuine search for unity among the churches in these islands and beyond is stronger than ever and needs radically renewing.
Ambitions for church unity are unrealistic and are being replaced in practice by local action, national church leaders have said. The heads of the churches responded to questions put to them by the Church Times and the Baptist Times