Is there a biblical command to commemorate the day of Jesus’ resurrection?

This lesson plan in the manual is an overview of the atonement of Jesus Christ.  Because we will be studying the details of the atonement in future lessons – today I’m going to take a slight departure from the outline to focus on why Christ’s resurrection is referred to as Easter – as in the title of this lesson. 

There is a lot of confusion regarding what Easter Sunday is all about.  For some, Easter Sunday is about the Easter Bunny, colorfully decorated Easter eggs and baskets full of jelly beans and peeps.  Most people understand that Easter Sunday has something to do with the resurrection of Jesus but are confused as to how the resurrection is related to the Easter bunny and eggs.  Biblically speaking, there is absolutely no connection between the resurrection of Jesus Christ and the common modern traditions related to Easter Sunday.  Essentially, what occurred is that in order to make Christianity more attractive to non-Christians, the ancient Roman Catholic Church mixed the celebration of Jesus’ resurrection with the pagan celebrations that involved spring fertility rituals.  These spring fertility rituals are the source of the egg and the bunny traditions.  Easter has nothing to do with Jesus’ resurrection on a Sunday.  As a result, many Christians feel strongly that the day on which we celebrate Jesus’ resurrection should not be referred to as “Easter Sunday.”  Rather, something like “Resurrection Sunday” would be far more appropriate and biblical.  For the Christian, it is absurd that we should allow  Easter eggs and bunnies to be the focus of the day instead of Jesus’ resurrection.   

What does the Bible say about Easter?  If one were to search