Definitions vary from place to place and from epoch to epoch. We do celebrate the Resurrection... but not the resurrection of spring.
By which he said "as often as you do it". So, it could be any Sunday... or Monday.... or whenever.
He didn't say to do it on just one day. And you can't remember his death, his blood without remembering His resurrection.
Philippians 3:10
9 But in vain they do worship me, teaching for doctrines the commandments of men.
Celebrating the resurrection is not a "teaching for doctrines" nor is it a "commandment.". So I don't think it applies.
Agreed. When we worship the Father and Jesus, we do it on the basis of scriptural truth.
What about Philippians 2:9 ___________
I find Scriptural truth is what Jesus instructed as to who to direct worship as found at John 4:23-24.
I can't find anywhere where Jesus instructed a celebration of his resurrection.
The only instruction was about his 'day of death' (Luke 22:19)
That death day comes only once a year - Nisan the 14th day.
Just as Passover day still comes only once a year.
Just as a wedding anniversary does Not always come on a Friday, his day of death does Not always fall on a Friday.
So, his resurrection day could Not always come on a Sunday.
There is No such thing in Scripture as a Sunday set aside as Resurrection Sunday.
Yes, always on a Sunday would be a teaching for doctrines the commandments of men - Matthew 15:9
The the Greek/English Interlinear it reads:
.... as often as if ever you may be drinking....... 1 Corinthians 11:25
.... as often as for if ever you may be eating.... 1 Corinthians 11:26
In Latin the word ' often ' reads as ' seldom '.
Eating the bread and drinking the memorial wine (the cup which stands for the new covenant (testament) would be on the anniversary of the day of Jesus' death which does Not come on an annual Friday, just as resurrection day could Not always be on a Sunday. Nisan 16 would Not always fall on a Sunday.