Determination of the day of the week in the year row (07) is located in column G. The letter in the century row (13) and column G is E, so the day of the week is Friday. January 1 corresponds to G, G in the year row (00) corresponds to F in the century row (20), and F corresponds to Saturday. A pithy formula for the method: ""Date letter (G), letter (G) is in year row (00) for the letter (F) in century row (20), and for the day, the letter (F) become weekday (Saturday)"". Use 17 (in the Gregorian century row, column C) and 83 (in
Week of Prayer for Christian Unity week of prayer, for example around Pentecost (as originally suggested by the Faith and Order movement in 1926, and Pope Leo XIII in 1894), which is also a symbolic date for the unity of the church. The 2008 Week of Prayer for Christian Unity was celebrated as the centennial. For the 2012 Week, the biblical text 1 Corinthians 15:51 was chosen with the theme "We will all be changed". The 2016 Week is provided by the Churches of Latvia and the theme is that all Christians are 'Called to proclaim the mighty acts of the Lord'. Week of Prayer for