The Apostle's Fast and the Canons of Nicea

deaddog

I read and heard sermons (by The Late Bishop Gregorious) that the Nicen council changed the name of the Apostles Fast from the "Fast of the Pentecost" to "the Apostoles Fast". I can't figure out which canon of the Nicen canons that was. If you have a reference to the Canon No, web site, or a book that has this information please let me know. I know that some of the "Arabic" very old church history/rite books do mention this, but non-of-which mention which canon it is.

Any help will be great.
Thank you and God Bless