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Prime dates
==================================
1999-11-19, Magnus Bodin <magnus@bodin.org>

The "prime date" 1999-11-19 has all prime numbers in it. In that respect that 
both 1999, 11, and 19 is a prime number. The next time THAT will happen is 
2003-02-02. (On each prime year, there is actually 82 prime dates.)

Then, if you write the date as one single number, then it is a lot of them. 
This is just a few examples: (where it is primes in at least 2 of the columns)

  YYYYMMDD  MMDDYYYY  DDMMYYYY
  19991129  11291999          
  19991227  12271999          
            01102001  10012001
  20010127  01272001          
            01312001  31012001
  20010209            09022001
  20010223            23022001
  20010307  03072001          
  20010323            23032001
            04042001  04042001
            05152001  15052001
  20010517  05172001          
            05262001  26052001
            06082001  08062001
  20010701  07012001          
            07102001  10072001
            07122001  12072001
            07182001  18072001
            08062001  06082001
  20010811  08112001          
            08232001  23082001
  20010929  09292001          
  20011001  10012001  01102001
  20011007  10072001  07102001
            10192001  19102001
            10272001  27102001
            10282001  28102001
            11182001  18112001
            12072001  07122001

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