Math+Holidays

=Math Holidays= toc Add this calendar widget to your page or blog.

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15th Sonya Kovalevsky Day
On this day, girls and women get together and geek out mathematically - usually, solve fun problems and eat Pi. [|Picture from University of Iowa Sonia Kovalevsky Day]
 * [|Sonia Kovalevsky Day: Women Mathematician Holiday]**

7th 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]**



14th Pi Day
On Pi day, people bake pi(es) and play with circles! [|Pi pie, from Kitchen Daily]
 * [|Pi Day] (also Albert Einstein's birthday)**

Google Pi Day logo, 2010

You can also celebrate by making a Pi necklace.



Or listening to how Pi sounds on piano. media type="custom" key="24602238"

More ideas from [|Math is not a crime blog].

20th-21st The 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.
 * [|March Equinox]**

[|Ihor Charischak's explanation] of the holiday. [|Erathosthenes page]

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4th Star Wars Day
On this day, people practice Jedi Mind Math Tricks on one another. The traditional holiday attire is a pun t-shirt involving a formula. [|T-shirt from Zazzle] Mind Tricks from [|Cut the Knot]
 * [|Star Wars Day] ("May the Forth...)**

21st-22nd The 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.
 * [|June Solstice]**

[|Ihor Charischak's explanation] of the holiday. [|Erathosthenes page]



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!

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**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. [|Hyperbolic Paraboloid party] in Second Life

18th 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.
 * [|Software Freedom Day]**



**22nd-23rd The 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.
 * [|September Equinox]**

[|Ihor Charischak's explanation] of the holiday. [|Erathosthenes page]

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**25th 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. Picture from [|ToonTalk "Resort Infinity" project]
 * Math Story Day**

**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!

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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.




 * 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.

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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

 * [|Valentine's day Mobius Hearts]