Ecclesial Calendar is a small program written in cooperation with George Gallagher. It displays the dates for Easter, Ash Wednesday, Ascension Day, Pentecost and the day of the week on which Christmas occurs for any year between 1584 and 2190. Ecclesial Calendar is free, but if you find it useful, you should donate a small sum to the trust fund, set up by George and his wife Margaret, on behalf of their daughter Mary Catherine, who is autistic. The money raised by the fund will be used to send Mary Catherine to the Option Institute in the United States.