Pi Day: March 14, 2026
Pi Day: March 14, 2026
The first three digits of pi are 3.14, making March 14 the perfect day to celebrate this mathematical constant.
Pi, often represented by the mathematical symbol “π,” represents the ratio of a circle’s circumference to its diameter. It’s common in math and science, with practical uses anywhere circles, spheres or ellipses are used.
In 2009, the U.S. House of Representatives passed H.Res.224, a resolution supporting the designation of Pi Day, recognizing the importance of the National Science Foundation’s math and science programs, and encouraging schools to celebrate with activities focused on pi and the study of math.
Key Stats
Source: 2024 American Community Survey (ACS), 1-year estimates
Note: The table above is modified to hide the margin of error columns and outline in blue the computer, engineering, and science occupations. Click on the image for the full table. Click on the Geography tab for other geographies such as “State,” then “All States in United States.”
Note: The cropped table above contains occupations that use “pi,” such as mathematicians and statisticians. Click on the image for the full table.
More Stats
Source: Quarterly Financial Report (QFR) 2010-2025
Source: Quarterly Services Survey (QSS) 2007-2025 (2012-2025 for NAICS 5414)
Source: 2023 Annual Business Survey (ABS) Program
- 5413: Architectural, Engineering, and Related Services
- 5414: Specialized Design Services
- 5415: Computer Systems Design and Related Services
- 5416: Management, Scientific, and Technical Consulting Services
- 5417: Scientific Research and Development Services
Source: 1978-2023 Business Dynamics Statistics (BDS)
Source: 2023 County Business Patterns (CBP)
Source: 2023 Nonemployer Statistics (NES)
Various U.S. Census Bureau products related to Science, Technology, Engineering and Math (STEM)