I hate birthdays. They are non-negotiable and I have a natural dislike for anything that cannot be negotiated.
Worst are the ones where you cross over into another decade. If you’re 69, people just say they think you’re old. Then you become 70, and they start saying you’re ancient. You start meeting people who seem mildly surprised that you’re still alive, or at least wonder how you’re still managing to get out of the house without crutches. By the time you become 71 they’re getting used to it and you’re just back to being old again. Things calm down, all the way to 79. Then you turn 80 and the whole idiocy starts all over again.