I don't understand why we celebrate birthdays.
People who celebrate or publicize their own irk me, because it always seems as if they expect something. When you're celebratating on behalf of someone important to you, however, it's more that you're showing your pleasure at having him/her in your life.
By counting down the years until they die?
Up. It is less than optimal for me to forget my wife's birthday. My mother just turned 68. That means she's 86. I keep telling her not to give her age in Centigrade, but she's got her own agenda.
Separate names with a comma.