Tuesday, March 3, 2009
Happy Square Root Day!
Today is 03/03/09
(03)^2 = 09
Square Root Day is an intellectual holiday celebrated on dates where the day and the month are both the square root of the last two digits in the current year.
Today is a square root day = March 3, 2009 (3/3/09), and the next square root day will be April 4, 2016 (4/4/16). The final square root day of the century will occur on September 9, 2081. Square root days fall upon the same nine dates each century.
One suggested way of celebrating this holiday is by eating root vegetables cut into shapes with square cross sections (thus creating a "square root").
Upcoming "Math Day celebrations" are March 14th and July 22.
Pi Day and Pi Approximation Day are two holidays held to celebrate the mathematical constant π (pi).
Pi Day is observed on March 14 (3/14 in ISO date format), due to π being roughly equal to 3.14.
Pi Approximation Day is observed on July 22, due to π being roughly equal to 22/7.
(H/T Roger B.)