I have a close relative whose birthday is today. To her and others born today, Happy Birthday. When we consider how many people are born on a given day, it’s a large number.
I remember in Statistics class, the professor said in our class of 30, two of us should share the same month and day. None of us did. Plus, over time, the number of people born on a given day is very large.
Not asking for ages, but the odds are the older you are, the more people born on any day since you were born is much larger than someone much younger.