A 40th birthday sounds a little different when you do the math this way. It is really just 29 making another appearance, and that feels much easier to accept.
Send this to a friend who still feels 29 no matter what the calendar says. It fits anyone celebrating the big 4-0 with a smile and a firm refusal to act their age.
A birthday number is only one part of the day. Feeling good, having a laugh, and enjoying another year matter much more than what the candles say.