SUGGESTION :Ökumenisches Heiligenlexikon
Ökumenisches Heiligenlexikon is an ecumenical resource that shows precisely what Faithlife can do to make themselves stand out as truly serving all communities. Catholic, Evangelical/Lutheran, Anglican, Orthodox, Armeniah, Coptic, Syrian Orthodox, Syrian Church of the East . . .
One could see the calendar with various filters; one could have Factbook (or Wiki) entries to provide basic information.
There are also some relevant resources not included in this site e.g. New Book of Festivals and Commemorations: A Proposed Common Calendar of Saints by Philip H. Pfatteicher
Orthodox Bishop Alfeyev: "To be a theologian means to have experience of a personal encounter with God through prayer and worship."; Orthodox proverb: "We know where the Church is, we do not know where it is not."