Matt. 28:1; Mark 16:2,9; John 20:1,19- the Gospel writers purposely reveal Jesus' resurrection and appearances were on Sunday. This is because Sunday had now become the most important day in the life of the Church.
1 Cor. 16:2 - Paul instructs the Corinthians to make contributions to the churches "on the first day of the week," which is Sunday. This is because the primary day of Christian worship is Sunday.
Rev 1:10 - John specifically points out that he witnesses the heavenly Eucharistic liturgy on Sunday, the Lord's day, the new day of rest in Christ.
Matt. 16:19; 18:18 - whatever the Church binds on earth is bound in heaven. Since the resurrection, Mass has been principally celebrated on Sunday.
Set up an automatic bank withdrawal. The problem would be to locate a bank somewhere on the planet that would date the transaction appropriately allowing for time zone. Set up a webcam in the sanctuary and there it is!