A birthday, anniversary, or age calculator can be a handy tool for keeping track of important dates. By inputting the date of birth, anniversary, or age into the calculator, you can easily calculate how old someone is, or how many years have passed since a special event. This can be a useful tool for remembering important dates, as well as for calculating ages for legal purposes.Calculate your age on your birthday or anniversary, Calculate how old someone is in years, months, and days.In conclusion, find out the age that you were born on!