What year was Easter Island found?

I presume you are asking when European explorers found the island and named it Easter Island. Dutch explorers "found" the island on Easter Sunday in 1722. It was named Easter Island by the Dutch navigator, Jacob Roggeveen because of the Christian holiday on which it was discovered by them.

Of course the ancestors of today's Easter Islanders found it long before that, about 700-800 CE according to many scientists.