"Every year when each of Job's sons had a birthday, he invited his brothers and sisters to his home for a celebration. On these occasions they would eat and drink with great merriment. When these birthday parties ended--and sometimes they lasted several days--Job would summon his children to him and sanctify them, getting up early in the morning and offering a burnt offering for each of them". Job 1:4 The Living Bible
The greatest birthday party ever is recorded in Luke 2. Angels and shepherds rejoiced at the birth of Jesus Christ--something that Jehovah's Witnesses would like to forget about!