In the Slavic Typicon the Polyeleos is prescribed on Sundays from Sept 22nd to Dec 19th, Sundays from Jan 15th to Cheesefare Sunday, and any Sunday on which a Polyeleos rank Feast falls. On Prodigal Son, Meatfare, and Cheesfare Sundays Psalm 136 is added. On all other Sundays Psalm 118 is presrcibed. However, I think it is common parochial practice to use the Polyeleos every Sunday.
Fr. Deacon Lance
Thanks for the reply. Actually, singing the polyeleos between those two dates is what we have been doing at St. Mary's for as long as I can remember. I had no idea that this practice was according to the Slavic Typicon, which is strange because we are an Antiochian parish. I know Antiochians pride themselves on being or trying to represent themselves as pan-Orthodox, but we use the Mikron Typicon as well as Arabic sources and the Menaion published by HTM. I'm trying to get the protopsaltis of the diocese to answer this question, too.