What I mean is that my actual birthday falls in October, but the weeks display is displaying the week where I turn X as having happened a few weeks ago. I'm being a bit vague because I'd rather not publicly post my exact birthday and age, but I believe you can recreate the same issue using the input posted by iamben above - saying you are born on <today's date> 1970, shows the week where you turned 50 as having happened many weeks in the past, when it should obviously be this week (or +/- 1 week at most due to dates being complicated)