This question has often been asked. Our answer will be by way of brief comments on Good Friday and Easter.
"Good Friday", the Friday before Easter Sunday, a day of fasting, abstinence and penitence, is not observed by the God's Kingdom Society and many other Christians the world over. This is because the designation of the day in which Christ was purportedly killed as "good" is unjustifiable from the standpoint of the Scriptures. The day was good to the enemies of light because it was the day the man they called a "deceiver" was killed. But to the disciples of Jesus, that day was one of sorrow, weeping and lamentation. Jesus Christ had forewarned his disciples: "Verily, verily, I say unto you, That ye shall weep and lament, but the world shall rejoice: and ye shall be sorrowful, but your sorrow shall be turned into joy." - John 16: 16-20. See also Matthew 26: 38; Luke 22:45; Mark 16:9,10. Jesus Christ has long been resurrected and glorified, never to die again. He did tell his disciples that their sorrow would be turned to joy, and added, "YOUR JOY NO MAN TAKETH FROM YOU." (John 16: 19-22) And so to continue to mourn every year for the risen and glorified Jesus is most unnecessary and very unscriptural. Moreover, if in the light of 1 Thessalonians 4:13, 14, Christians are exhorted not to mourn for the dead because of the hope of resurrection. Why then should the Churches mourn for the Star of that hope who had long ago been raised to glory in the heavens?
Easter is the name of a pagan festival that has nothing to do with the death and resurrection of Jesus Christ. Easter was originally celebrated by the Anglo-Saxons in the spring equinox in honour of a Teutonic goddess known as Astarte or Eostre. The word "Easter" appears once in the Holy Bible, in Acts 12:4. All scholars of credit agree that it was a wrong translation of a Greek word for Passover. In the Bible Students Companion, William Nicholson wrote: "EASTER - An improper translation; for the feast of the Passover is meant, Acts xii. 4." He added, "Easter was the name of a Pagan festival observed in spring by our ancestors, in honour of the goddess Astarte or Eostro, a saxon goddess, the Ashtaroth of Syria. In all other places pascha is rendered Passover, the true meaning.' Concerning Easter, the Westminster Dictionary of the Bible states that it was "originally the spring festival in honour of the Teutonic goddess of light and spring known in Anglo-Saxon as Eastre. As early as the 8th century the name was transferred by the Anglo-Saxon to the Christian festival designed to celebrate the resurrection of Christ. In A.V. it occurs once (Acts 12:4), but it is a mistranslation. The original is pascha, the ordinary Greek word for Passover. R. V. properly employs the word Passover." - Page 145