Factual error: When a priest is speaking from a pulpit in church there is a sign board behind him indicating the hymns to be sung on Pentecost Sunday. The priest is wearing a green chasuble. On Pentecost Sunday he would be wearing a red chasuble.
Suggested correction: The board does say "Pentecost", yes. On the second line. The first line being "3rd Sun after", so that'd be Sunday June 24, not Pentecost and therefore no need for special paraments.