Forget Pi Day. Today is Pythagorean Triple Square Day.

Pi Day (March 14) is a day of global mathematical celebration, but it’s not the only numerically significant calendar date.
KNKX Public Radio

On 9/16/25, celebrate a date of mathematical beauty

Pi Day (3/14) often comes with sweet treats; Square Root Day (4/4/16 or 5/5/25, for example) has a certain numerical rhyme.

Readers’ Vote: 37 Math Jokes And Puns That Actually Make Numbers Fun

Do you know your geometry from your arithmetic and your fractions from your logs? Let’s find out! Think of this as a math class without the quizzes, where every problem has a twist solution, every ...
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Latest market numbers

Go here for the latest TSX numbers, here for the latest CSE numbers, and here for the latest Cboe Canada numbers. Go here for global market numbers from Bloomberg’s World Stock Indexes page. Go here ...