Noisemaker Distributed on Pi Day, March 14, 2015

Noisemaker Distributed on Pi Day, March 14, 2015

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Many Americans now write dates in numerical form, with the first digits for the month, the second for the day of the month, and the third for the year. Hence 3/14/15 represents March 14, 2015. When dates are written in this manner, the digits can be compared to the irrational number pi, the ratio of the circumference to the diameter of a circle. This number is roughly 3, more precisely 3.14, and more precisely still 3.1415926.
Since at least 1988, some mathematics educators in the United States have celebrated March 14 as Pi Day. Celebrations were especially intense in 2015, because 3.1415 includes digits of the year as well as the month and day. This noisemaker was sounded at the History and Pedagogy of Mathematics Meeting in Washington, DC, at 9:26 on March 14, 2015.
Currently not on view
Object Name
date made
Physical Description
plastic (mouthpiece material)
paper (extension material)
overall: 2 cm x 8.5 cm x 3 cm; 25/32 in x 3 11/32 in x 1 3/16 in
ID Number
nonaccession number
catalog number
Credit Line
See more items in
Medicine and Science: Mathematics
Science & Mathematics
Data Source
National Museum of American History
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