The island itself is incapable of celebration of any kind. Its' inhabitants are another story altogether. Perhaps you would like to restate your question.
Easter Island derived its name from Dutch explorers who first visited the island on Easter Sunday, 1722. From the 2002 census some 39 percent of the population of 3,971 are of European or Chilean...
Thousands of years of paganism in Europe didn't just go away because a new religion came on the scene (Christianity). Easter falls near the Spring Equinox and the eggs are a symbol of rebirth......