What's more important; Christmas or Easter?

Jesus never told anyone to remember His birth but He told them to remember His death in the Lord's supper

If there had been no birth, there would have been no sacrificial death. His birth was heralded by angels. Realistically though, why would it matter to label one of greater importance than the other? 

Easter.  "The Last Supper" was Passover, and plus "rebirth" is significantly more unusual than "birth", and Jesus was not even born on Dec 25.

I believe the Resurrection (Easter) because since Christ lives, we also will live with Him.  From Genesis to Revelation in the Holy Bible, it is all about Jesus the Christ and what He would do for those who believe.

Easter is more important but less commercialisable.

Those who try to celebrate the birth of Christ without believing in His resurrection from the grave as a grown man, do not celebrate the arrival of the Son of God into our world (irrespective of what date is used). Likewise, those who rejoice on Resurrection Sunday without believing the Son of God was the Word who became flesh via the virgin, make a mockery of both. It is the RESURRECTION of Christ that is the triumph of His mission to Earth, for it proves Him to be who He claimed to be – the Son of God, whom death could not hold because He gave Himself over to death sinless – Romans 1:2-4 But you could not have the latter without the first - birth, sinless living, death, and resurrection.

No, but Christ's resurrection is more important than either his death or his birth.  Easter is the holiest holiday in my church.

Easter is the central holy day of the Christian faith. The whole purpose of Christmas was to make Easter possible.

Well, put it this way, if Jesus had never been born (which is what we celebrate at Christmas  - Jesus' birth) then, of course, there would be no necessity for Good Friday and Easter would there?

However, Jesus WAS born, so we celebrate His birth at Christmas, Jesus DID die on the Cross for our sins to be forgiven and Jesus DID rise from the dead on Resurrection Day - (Easter Day).

So they are all important.

If He hadn't been born, He couldn't have died for us.  If He hadn't died for us, He couldn't have risen could He?

Of the two, "Easter" has the greater importance.  However Christmas is the more popular.

Christmas is a feast - a time of celebration and joy.  Easter is a fast - a time of self denial and repentance. For some reason, feast is preferred to fast by most people.