Square Root Day
Template:Short description Square Root Day is an unofficial holiday celebrated on days when both the day of the month and the month are the square root of the last two digits of the year.[1] For example, the last Square Root Day was Monday, May 5, 2025 (5/5/25; Cinco de Mayo), and the next Square Root Day will be Friday, June 6, 2036 (6/6/36).Script error: No such module "Unsubst".Script error: No such module "Check for unknown parameters". The final Square Root Day of the 21st century will occur on Tuesday, September 9, 2081. Square Root Days fall upon the same nine dates each century.
Ron Gordon, a Redwood City, California high school teacher, created the first Square Root Day for Wednesday, September 9, 1981 (9/9/81). Gordon remains the holiday's publicist, sending news releases to world media outlets.[2] Gordon's daughter set up a Facebook group where people can share how they were celebrating the day.[3]
One suggested way of celebrating the holiday is by eating radishes or other root vegetables cut into shapes with square cross sections (thus creating a "square root").[4]
Full list
Square Root Day occurs on the following dates each century:
- 1/1/01
- 2/2/04
- 3/3/09
- 4/4/16
- 5/5/25 (Cinco de Mayo)
- 6/6/36
- 7/7/49
- 8/8/64
- 9/9/81