How can you place the numbers 1 through 9 in a 3×3 grid such that every row, column, and the two diagonals all add up to 15?

How can you place the numbers 1 through 9 in a 3×3 grid such that every row, column, and the two diagonals all add up to 15?

What day would tomorrow be if yesterday was five days before the day after Sunday’s tomorrow?
Riddle Answer