According to Jehovah's Witnesses what does the Bible say about Easter?

Jehovah's Witnesses are well known for avoiding most if not all religious holiday celebrations. Most reasons center on the apparent linkage of these celebrations with various pagan celebrations and feasts celebrated by non-Jews before Jesus came to earth and established Christianity. What specifically do JWs say about the Easter holiday and its origins and what (if anything) the Bible has to say about celebrating Easter?