In answer to the question, on Pentecost--the first day of the church:


1 MINUTE GOSPEL by Torben Sondergaard
"In the past God overlooked such ignorance, but now he commands all people everywhere to repent. For he has set a day when he will judge the world with justice by the man he has appointed. He has given proof of this to everyone by raising him from the dead.” Acts 17:30-31

 

"“Therefore let all Israel be assured of this: God has made this Jesus, whom you crucified, both Lord and Messiah.”
 

When the people heard this, they were cut to the heart and said to Peter and the other apostles, “Brothers, what shall we do?” Peter replied, “Repent and be baptized, every one of you, in the name of Jesus Christ for the forgiveness of your sins. And you will receive the gift of the Holy Spirit. The promise is for you and your children and for all who are far off—for all whom the Lord our God will call.”" Acts 2:36-39