I believe that a birthday song should be a "Victory" song regardless how old we can be. Every year that added to our life should be consider a miracle. Millions of human being were not given the chance to live as long as they want to. Babies that were dead didn't give their parents the joy of seeing them growing up. Teen-agers that died didn't had the chance of seeing their selves becoming successful in the careers they would have choose. I may go on and on, but my point is, I believe that we should be proud of the length of hours we have stayed here on earth. Let us not hide our true age, as some did, instead, we should be happy that another year is being added to it.
Consider the cancer patients, birthdays have a special meaning for them and to their loved ones. They understood that the life is a gift from God, and that every year that added to it is a miracle. They hope that there will be many more birthdays to come to them.
"Teach us to number our days aright, that we may gain a heart of wisdom." (Psalm 90:12 NIV)