A birthday magic square is a special type of magic square that uses someone's birth date in the top row. Then every row, column, and main diagonal add up to the special birthday number - and a whole lot of other magic properties as well!

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Notes:
Some people have realised it isn't always possible to make a birthday magic square that avoid negative values or repeats.
In fact, if your total is less than 34, then you will either have repeats or negative values.
Since a total less than 34 is unavoidable for some birth dates, I advise you don't worry about it.
But if you embrace negative values, I think you can always avoid (additional) repeats.