Square Root Day 5/5/25: The Fifth of Nine Special Dates in the 21st Century

Happy Square Root Day!

Today is 05/05/2025, which means we are celebrating the fifth of nine Square Root Days in this century. Why is that remarkable? Because this kind of date happens only 9 times in 100 years.

The idea is as simple and elegant as mathematics itself: if the month and day equal the square root of the last two digits of the year, we have a holiday. Today is May 5, 2025, and √25 = 5. Hence — 5/5/25.

All Nine Square Root Days of the 21st Century

The first such day was 1/1/01, and the last one in the 21st century will fall on 9/9/81. That means we have officially reached the halfway point — 5 out of 9.

Here are all the dates for the century:

• 1/1/01
• 2/2/04
• 3/3/09
• 4/4/16
• 5/5/25 ← today!
• 6/6/36
• 7/7/49
• 8/8/64
• 9/9/81

The Origin of Square Root Day

The holiday was created by Ron Gordon, a teacher from California. His daughter even started a Facebook group where people share photos of root vegetables carved into square shapes — real “square roots,” naturally.

So if you happen to be eating radishes cut into little squares today, you are officially in on the joke.

Make Your Wishes Count Before the Next Square Root Day

Most importantly — make wishes today and set goals for where you want to be by the next Square Root Day. You still have 11 years. May everything good come true!