When Is The Next Pi Day 2025. Pi day is observed next on friday, march 14th, 2025 (223 days from today). The value of pi never changes (3.14… etc.), and so neither does pi day.
The beautiful constant pi (π) is celebrated by mathematicians around the world on national pi day on march 14. Are you as excited as we are about the next pi day on march 14th, 2025?