This thought just occurred to me:
We all - even Jehovah's Witnesses - mourn our loved ones when they die. We cry and wail, with good reason. At the funeral, there's music, and speeches telling people all the good qualities the person had.
Since this is the case, and we all gather around and mourn the loss of our loved ones, then why shouldn't we be allowed to gather and celebrate the fact that a loved one is one year older, and therefore still alive?
If it's really so wrong to celebrate birthdays because it's a kind of person-worship, then JWs should be consequent and stop holding funerals, because as mentioned, funerals are all about the person who died, with lots of people gathering, music and speeches etc. Obviously two separate occasions, one a celebration and one a mourning event, but nonetheless; a celebration of life should be in it's place just as much as a funeral is at life's end. And since we don't know when death comes knocking, celebrating it once a year would be a good idea.
What do you think of this reasoning?