The traditional date for the Week of Prayer for Christian Unity is January 18-25. The octave (eight days) has been celebrated continuously since 1894, but was a dream of many Christian leaders since the early years of the 19th century. 

Worship Ideas

Two Communion Liturgies (22.44 KB): Two communion services which can be used for Worldwide Communion Sunday, Canadian Multiculturalism Day, etc.
Week of Prayer for Christian Unity 2021 (34.41 KB): www.weekofprayer.ca is a website devoted to the Week of Prayer. This year's theme is John 15:5-9.

Related Material

Ecumenical Prayer Cycle (33.48 KB): The World Council of Churches' Ecumenical Prayer Cycle takes us through every region of the world over the course of a year.