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## Special Daze

Get ready....a bunch of special days will soon occur....

Why should the number pi get all of the special attention, when we also could celebrate the following days as well:

• January 1st at 2:35 pm: Fibonacci-Day [Uses sequence 1, 1, 2, 3, 5...]
• January 3th at 5 pm: Odd-day [first sequence of odd digits 1-3-5]
• January 4th at 2:8 pm: One-Seventh Day [1/7 = 0.142857....]
• January 4th at 2:21 pm: SQR(2)-day [Sqr(2) = 1.41421356...]
• January 6th at 6:03 pm: Phi-Day [phi = 1.618033989...]
• January 7th at 3:20 pm: SQR(3)-Day [Sqr(3) = 1.7320508...]
• January 9th in 2010: Addend-Day [since 1+9=10 on 1/9/10...also celebrated on September 1st in 2010]
• January 11th Palindrome-Day [given day is 01/11/10]
• January 20th at 1:23:45 pm: Factorial-day [since 1x2x3x4x5=120 or 5!=120]
• February 3rd at 5:07 pm: Prime-day [First sequence of primes 2-3-5-7]
• February 5th: Product Day [first occurance of a product such as 2x5=10...also celebrated on May 2nd in 2010]
• http://www.neatorama.com/tag/math/
• February 7th at 6:28 pm: e-day [e = 2.71828182...]
• February 23rd at 6:06 am: SQR(5)-Day [SQR(5) = 2.236067...]
• March 6th in 2010: Triangular-Day [3,6,10 are consecutive triangular numbers]
• March 14th at 1:59 pm: Pi-day [pi = 3.141592654...]...Note: some celebrate Pi-Day on March 1 at 4:15 pm!
• March 24th at 6 pm: Silver-day [Silver Number = 3.2469766037...]
• April 6th at 6:? am: Feigenbaum's-Day [constant = 4.66920160910299067...]
• May 7th at 7:21 pm: Gamma-Day [gamma = 0.577215664901...]
• June 28th: Perfect Number-day [as 6 and 28 are the first perfect numbers]
• November 1st in 2010: Subtrahend-Day [as first occurencve of a subtraction 11 - 1 = 10 for 11/1/10]
The list could go on...perhaps we could search out more math constants and thereby create a math holiday to celebrate every week....and our students might learn some more mathematics as well.

Or, your students could creatively invent some new numerical holidays....please send them for possible inclusion on this list (with credit given of course). Note that the months August-December are begging for some attention.

I know. All of this is folly amidst weird numerical celebrations (i.e. some are actual days...you determine which). They may seem irrational to outsiders....but then what can be expected, given so many of the numbers involved are irrational!