Atonement , Passover, Feast of Dedication , Pentecost, Trumpets
and Tabernacles will all be kept during the Millenium.
Why do you need to wait for everyone else before you can honor the Feasts of the Father? The one whose heart is truly circumcised may indeed partake in the Passover, (Exodus 12:43-48).
1 Corinthians 5:7-8
7. Purge out the old chametz-leaven so that you may be a fresh-renewed lump, (having no indication of leavening or fermentation) as you are indeed like matzot-unleavened bread; and because our Pesach, Messiah, has been sacrificed for us.
8. Let us therefore keep the feast, not with old (old man nature) chametz-leaven, nor with the chametz-leaven of malice and wickedness, but with the matzot-unleavened bread of sincerity and truth.
The feasts continue on with or without you until you enter that Rest.