Pi Day
UK/ˈpaɪ deɪ/
Pi Day proper noun: march 14th, an annual celebration of the mathematical constant π (pi).
Proper noun
Pi Day
- March 14th, an annual celebration of the mathematical constant π (pi).
- Did you know that March 14 is Pi Day (no, π is not misspelled). Pi Day is celebrated on 3/14 or 3.14! To commemorate this remarkable ratio, we have a few circular activities. The first is the Pizza Survey. What are the students' favorite toppings on pizza? What do you like best?1997, Louise Bock, Susan Guengerich, Hope Martin, “March Celebrations”, in Multicultural Math Fun: Holidays around the Year, Portland, Me.: J. Weston Walch Publisher, →ISBN, page 83
- As Quakers, we do not as a matter of religion celebrate any holidays (more accurately, all days are to be considered holidays because they have equal potential for revealing the Divine to us), but as a cultural matter we celebrate all kinds: Hindu, Christian, Jewish, ethnic, birthdays of famous...1999, David H. Albert, “Exits and Entrances”, in And the Skylark Sings with Me: Adventures in Homeschooling and Community-based Education, Gabriola Island, B.C.: New Society Publishers in cooperation...
Pi Day meaning in Tamil, Bengali, Malayalam and Odia
Pi Day in Tamil
- March 14th, an annual celebration of the mathematical constant π (pi)
- பை நாள் pai nāḷ
Pi Day in Bengali
- March 14th, an annual celebration of the mathematical constant π (pi)
- পাই দিবস pai diboś
Pi Day in Malayalam
- March 14th, an annual celebration of the mathematical constant π (pi)
- പൈ ദിനം pai dinaṁ
Pi Day in Odia
- March 14th, an annual celebration of the mathematical constant π (pi)
- ପାଇ ଦିବସ pāi dibasa
More languagesFewer languages
- Pi Day in Sinhala
- පයි දිනය payi dinaya
- Pi Day in Assamese
- পাই দিৱস pai diwox
- Pi Day in Nepali
- पाई दिवस pāī divas
- Pi Day in Arabic
- يوم ط
- Pi Day in Indonesian
- Hari Pi
- Pi Day in Persian
- روز پی
- Pi Day in Thai
- วันพาย
- Pi Day in Vietnamese
- Ngày số pi
Examples of Pi Day in a sentence
- March 14, or 3/14, is recognized by math geeks as Pi day.2015 March 14, Sam Ro, “March 14, 2015 will be a once-in-a-century thrill for math geeks”, in Business Insider, archived from the original...
- Pi lovers like to celebrate Pi Day every year.2016, Liz Strachan, “A Little More Pi”, in Easy as Pi: Maths Made Simple, London: Robinson, →ISBN:
Forms of Pi Day
| alternative form | π Day |
|---|
Origin of Pi Day
pi + day, from the date March 14th in the month/day format (that is, 3/14), 3, 1 and 4 being the first three significant digits of the mathematical constant π.
Questions about Pi Day
- What does Pi Day mean?
- Pi Day means march 14th, an annual celebration of the mathematical constant π (pi).
- What is Pi Day in Tamil?
- Pi Day in Tamil is பை நாள் (pai nāḷ). See Pi Day meaning in Tamil.
- How do you use Pi Day in a sentence?
- March 14, or 3/14, is recognized by math geeks as Pi day.
- What part of speech is Pi Day?
- Pi Day is a proper noun.
- How do you pronounce Pi Day?
- Pi Day is pronounced /ˈpaɪ deɪ/ (UK).
Words near Pi Day in the dictionary
Source and license
Adapted from Wiktionary: Pi Day (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.
Last updated:
Pronunciation audio from Wikimedia Commons, each file under its own free license: en-au-Pi Day.ogg.
Cite this entry: “Pi Day.” Word.ws, https://word.ws/pi_day. Based on Wiktionary, CC BY-SA 4.0.