The Irish Football Association was forced to hold the match on a Sunday by UEFA which has introduced new rules to get more people involved in the game.
Members of the Free Presbyterian Church gathered outside the ground as Northern Ireland faced Finland in a Euro 2016 qualifier.
Revd Raymond Robinson, from the Tyndale Memorial branch of the Free Presbyterian Church, told the Press Association: "Our opposition is to the breaking of observance of the Lord's day.
"We believe in the Sabbath being kept holy. It seems more and more that the football agenda is being driven by the television companies and not what God says, or what public opinion is.
"A delegation met the IFA and expressed our concerns. We found it interesting that the likes of Gibraltar and Spain had special circumstances (within the UEFA schedule) but the IFA couldn't have the same for observing Sunday as the Lord's day.
"We were also surprised at the IFA not contacting local churches about the fixture, which we felt would have been common courtesy.
"They did say they would seek to accommodate us and help out but if we had never mentioned it that would never have happened."
Evangelical Christians protest outside Windsor Park over decision to hold NI team's Euro 2016 qualifier on a Sunday pic.twitter.com/Dn7VUW1fE7
— Cool FM News (@newsoncool) March 29, 2015