Hello, please dont insult other members, and I strongly believe calculating date of birth from age is not that perticularly unuseful. Although you cant know their exact dob, but what the result gives you is a date that is relative to today's date. eg. if today is Jan 11 2007, then if you want to find out people who is under 20 years old, you will subtract 20 years from it, so people who born after Jan 11 1987 will all be less than 20 years old... btw, you cant simply subtract the years, because this is just a simple example, since it also depends on the time, as well as the time zone, so is not that simple as you think.
Ted
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