Pieology Pi Day 2025 Theme. On march 14, pieology is celebrating pi day by offering 3.14x rewards points for all pie life rewards members nationwide. Math enthusiasts and bakers celebrate pi day.

The 2025 theme for international day of mathematics is “playing with math.” organizers invite students and educators to “celebrate mathematical games, puzzles. Several pizzerias and bakeries offer slices or small portions for $3.14 on 3/14.