Math Holidays

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January

15th Sonya Kovalevsky Day

Sonia Kovalevsky Day: Women Mathematician Holiday
On this day, girls and women get together and geek out mathematically - usually, solve fun problems and eat Pi.
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Picture from University of Iowa Sonia Kovalevsky Day

February

7th e Day

e Day
I don't know what people do on e Day. So here is a picture of Euler skiing up the exponential function. The portrait of the function from Homeschool Math Blog e Day page.

e-Day.jpg

March

14th Pi Day

Pi Day (also Albert Einstein's birthday)
On Pi day, people bake pi(es) and play with circles!
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Pi pie, from Kitchen Daily

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Google Pi Day logo, 2010

You can also celebrate by making a Pi necklace.

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Or listening to how Pi sounds on piano.


More ideas from Math is not a crime blog.

20th-21st The Equinox

March Equinox
Celebrate by participating in the Noon Day Project, that commemorates and recreates what Eratosthenes did over 2200 years ago to determine very accurately the circumference of the Earth. This is a holiday celebrated four times of the year, on two equinoxes and two solstices.

Ihor Charischak's explanation of the holiday.
Erathosthenes page




May

4th Star Wars Day

Star Wars Day ("May the Forth...)
On this day, people practice Jedi Mind Math Tricks on one another. The traditional holiday attire is a pun t-shirt involving a formula.
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T-shirt from Zazzle
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Mind Tricks from Cut the Knot

June

21st-22nd The Solstice

June Solstice
Celebrate by participating in the Noon Day Project, that commemorates and recreates what Eratosthenes did over 2200 years ago to determine very accurately the circumference of the Earth. This is a holiday celebrated four times of the year, on two equinoxes and two solstices.

Ihor Charischak's explanation of the holiday.
Erathosthenes page

300px-Summer_Solstice_Sunrise_over_Stonehenge_2005.jpg

28th Tau Day

Tau is double Pi
On this day, people make music videos and art about Tau. They also discuss why it's way better than Pi!


July

8th Math 2.0 Day

Math 2.0 Community Events

On this day, people play with math software and party in virtual math communities. It is the day Math 2.0 community was founded.
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Hyperbolic Paraboloid party in Second Life

September

18th Software Freedom Day

Software Freedom Day
On this day, people gift one another FOSS (free, open source software); create and share music, videos and other art made with free software; and get together to have local or online parties and seminars they can register at the day's site.

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22nd-23rd The Equinox

September Equinox
Celebrate by participating in the Noon Day Project, that commemorates and recreates what Eratosthenes did over 2200 years ago to determine very accurately the circumference of the Earth. This is a holiday celebrated four times of the year, on two equinoxes and two solstices.

Ihor Charischak's explanation of the holiday.
Erathosthenes page



25th Math Story Day

Math Story Day
On this day, people tell stories and share digital stories. You can add links to your math stories and register your group.
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Picture from ToonTalk "Resort Infinity" project

October

10th Powers of Ten Day

Powers of Ten Day

Celebrate 10/10 and especially 10/10/10 by watching the movies about powers of ten, listening to the Galaxy Song, and trying to visualize your place in the universe with interactives. Universcale works better than the infamous Total Perspective Vortex!



Also, Mary O'Keeffe points out that 101010=42 in binary.

21st Gardner's Celebration of the Mind

Gathering for Gardner: Celebration of the Mind

On this day, participants host a show and tell of math art and puzzles, build math sculptures, and otherwise engage in advanced humanistic mathematics. They can also share math sculpture or math toy gifts.

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OCT 31 = DEC 25

Carol Cross's blog post about Natural Math people celebrating in 2010 by playing a Glass Bead Game

Mike South reminds us: Halloween is geek Christmas!

Hint: this joke refers to octal and decimal number bases. Here is the converter.



December

20th-23rd The Solstice

December Solstice

Celebrate by participating in the Noon Day Project, that commemorates and recreates what Eratosthenes did over 2200 years ago to determine very accurately the circumference of the Earth. This is a holiday celebrated four times of the year, on two equinoxes and two solstices.

Ihor Charischak's explanation of the holiday.
Erathosthenes page

Math ideas for mainstream holidays