A little history of Easter found thru research on the net... The following text was found in http://www.holidays.net/easter/story.htm.  So next year, its better to say "Happy Resurrection!" than "Happy easter!"  to be more specific that we are celebrating the rising of Jesus rather than the festival of babylon god of fertility Eastar.

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Easter is a time of springtime festivals. In Christian countries Easter is celebrated as the religious holiday commemorating the resurrection  of Jesus Christ, the son of God. But the celebrations of Easter have many customs and legends that are pagan in origin and have nothing to do with Christianity.

Scholars believe the name Easter is thought to come from the Scandinavian  "Ostra" and the Teutonic "Ostern" or "Eastre," both Goddesses of mythology signifying spring and fertility whose festival was celebrated on the day of the vernal equinox.

Traditions associated with the festival survive in the Easter rabbit, a symbol of fertility, and in colored easter eggs, originally painted with bright colors to represent the sunlight of spring, and used in Easter-egg rolling contests or given as gifts.