I marked the day by attendance at Mass. It's a comfort to me that of all the days he could have died on, it was Sept. 8h - the day we commemorate the Blessed Mother's birthday. It has been a relief to me to be able to commend my earthly father to my heavenly Mother.
"Hail Mary, full of Grace,
the Lord is with thee,
Blessed art thou among women,
and blessed is the fruit of thy womb, Jesus.
Holy Mary, Mother of God,
Pray for us sinners, now and at the hour of our death. Amen"