Yellow Pig Day 2024. Yellow pig day originated in the 1960s when two math students from princeton spent a long time analysing the number 17. Yellow pigs day is an annual celebration associated primarily with the hampshire college summer studies in mathematics, a summer program in math for talented high school.

This day is all about celebrating the unique and quirky yellow pig that first appeared in a math book in the 1960s. Yellow pig day is a whimsical holiday celebrated annually on july 17th by mathematicians, particularly those with an affinity for number theory and quirky traditions.