Ratelband is 69 years old, but he wanted to be 49 legally, The Associated Press reported. He likened his petition to those who have changed their name or gender.
Dutch law, according to the court, assigns rights and obligations based on age -- rights like voting and attending school.
Ratelband isn't accepting the court's findings however and plans to file appeals. He said he's one of "thousands of people who want to change their age," the AP reported.
Ratelband said he is the victim of age discrimination, but the courts did not see it, saying, “There are other alternatives available for challenging age discrimination, rather than amending a person’s date of birth.”