It is indeed correct that the Church of God keeps the Passover one day earlier than the Jews do today. The reason is that based on the Bible, the Jews keep the Passover one day too late.
This year, the Church of God keeps the annual Passover on Sunday evening, March 28, after sunset. However, the Jews keep the Passover, beginning on Monday evening, March 29, after sunset. As we said, they keep it one day too late. They keep the Passover when the Bible commands to keep the "Night to Be Much Observed"--two totally different and separate occasions.
Please notice our comments in our free booklet, "The Meaning of God's Spring Holy Days":
"You are the light of the world. A city that is set on a hill cannot be hidden."
-Matthew 5:14