What does that have to do with it? These days are in the bible and belong to Jesus.
Im not an anti-semite or Jew-hater in any form, but we Christians do not need to keep Jewish holy days.
I want to do it and I know that doing so benefits us spiritually. You've never done it so how come you get to be the expert?
Want to know something that will benefit you spiritually? Receiving Christ’s Body and Blood in the Holy Eucharist. Nothing beats it. =)