2021-07-08 Math 2.0 Day Math 2.0 Day Recurring July 8 Recurring Math 2.0 Day "Mathematics is the key and door to the sciences." (Galileo Galilei)
2021-07-14 Tape Measure Day Tape Measure Day Recurring July 14 Recurring Tape Measure Day Wanna hear a joke about measurement? Nevermind it would take to long
2021-07-22 Pi Approximation Day Pi Approximation Day Recurring July 22 Recurring Pi Approximation Day Why is the pi in the sky up there so high?
