We have 2 year round Christmas stores in our area. They have been in business for awhile and doing well. They did tell me they sell a lot of Christmas lights year round when people are having weddings, parties, etc. because they can't buy them anywhere else during the spring and summer.
These stores also have a selection of other holiday items, Easter, Thanksgiving, Halloween and more. Those items are not stocked year round but only as those holidays arrive. You might considered a section of your store to serve that purpose to keep business year round. I am sure when they pop in for Easter goodies they will take an interest in the Christmas items as well.
Good luck to you and keep us posted. =)