Day of Atonement not a good idea
Asking for a Day of Atonement may not be such a good idea.
The Jewish people had a scapegoat sent into the desert with their sins laid on him on Yom Kippur, their annual day of atonement. Jesus’s death on Calvary was an event of atonement, literally a day of at-one-ment, and the Mass is a daily renewal of that.