https://genius.com/2736306 John Lennon: Well it was Sunday Bloody Sunday When they shot the people there. The cries of thirteen martyrs Filled the Derry air Is there any one amongst you Dare to blame it on the kids? Not a soldier boy was bleeding When they nailed the coffin lids!
Joe Mulheron has a song about BLOODY SUNDAY "... The Widgery mockery, there is not doubt.. ...on Englands's proud history a crime added yet/How can we forgive them? How can we forget?" https://mudcat.org/thread.cfm?threadid=7947
"Domhnach na Fola" is Irish Gaelic for Bloody Sunday, or "the Sunday of blood". But no, I don't have the lyrics. That song was a response to the Saville Report which accepted UK military responsibility for the 1972 killings. Most of the "Domhnach na Fola" videos coming up on youtube are about another bloody Sunday, during the Irish war of independence, when 14 people were killed in Croke Park sportsground in Nov. 1920.