Disability aside, a lot of people don't like birthday parties at work, for various reasons. For example I think some religions forbid celebrating ones birthday.

Disability aside, a lot of people don't like birthday parties at work, for various reasons. For example I think some religions forbid celebrating ones birthday. Other people just don't like it and think it's inappropriate for an office setting. I don't think it's an unreasonable request to not have one's birthday recognized at work, for whatever reason stated or unstated.