Square Root Day is an unofficial holiday that began in the 1980s and is celebrated when the month and day numbers are the square root of the last two digits of the year. For example, May 5, 2025 ...

A numerical pun, Square Root Day celebrates the alignment of a date into the form of the squaring of a number. For example, May 5, 2025, or 5/5/25, represents 5 x 5 = 25, with the square root of ...