When I got the question, of course I specified my date of birth. Don't know why that was important. It is obvious that I'm not young since I've got teenaged children. It's also obvious for anyone who meets me that I'm not planning to retire for many years. So why is my age important? I find that intrusive.
It is well known that a Swedish employer can ask about health problems, they can ask about private things like hobbies (who cares how I spend my spare time?), how many children I have living at home, they can actually ask about anything about religion and sexual preferences, according to the current law.
My proposal is that it should be forbidden to specify the age of the people you want to hire, it should be forbidden to only hire a certain sex. Politicians should stop talking about making certain rules for "unemployed youth", or "unemployed foreigners", or "unemployed housewifes" or whatever. Start treating everybody the same! Make the hiring process anonymous. Look at other countries such as Britain and the US and their laws.
Stop this Swedish very unprofessional way of interviewing, selecting and hiring people.