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 ...

This May marks the only time a calendar has a Square Root Day in a 20-year span, with the last one being on April 4, 2016 and the next one on June 6, 2036. In fact, the day is so rare that it only ...