How about this related pair of dates.

HalloweXmas

Oct 31 = Dec 25

How about Oct. 5, 1582 to Oct. 14, 1582?
Nowadays nobody knows about those no-days. (ups, a jawbreaker)

The mother nature is sometimes a bitch, hehe, it can [URL="http://www.mersenneforum.org/showthread.php?p=270295"]go so far[/URL] with the coincidences, considering that the Christmas is in fact a stolen Halloween (the first Christians used an older Pagan symbol to attract more adepts to their new religion).

[QUOTE=kar_bon;365743]How about Oct. 5, 1582 to Oct. 14, 1582?
Nowadays nobody knows about those no-days. (ups, a jawbreaker)[/QUOTE]
Depends where you are (were) in the world. September 3 to September 13 1752 were the corresponding no-days in some places.

For the year of 2014 all days valid in hex have the following factors:[code]2014feb01 3^2*11*43*2023009
2014feb03 5*5897*292079
2014feb05 23*61*6138239
2014feb07 3*37*67*1157987
2014feb09 353*24396457
2014feb11 19*453260491
2014feb13 3^2*71*883*15263
2014feb15 13*113*571*10267
2014feb17 5*11^3*17*163*467
2014feb19 3*59*48655081
2014feb21 5*41*42009509
2014feb23 [b]prime[/b]
2014feb25 3^3*318961087
2014feb27 97*431*205993
2014dec01 [b]prime[/b]
2014dec03 4703*1831133
2014dec05 3*11*13*20074169
2014dec07 17*506577559
2014dec09 5*191*823*10957
2014dec11 3*2870606171
2014dec13 5*1722363703
2014dec15 [b]prime[/b]
2014dec17 3*79*409*88843
2014dec19 281*797*38453
2014dec21 [b]prime[/b]
2014dec23 3*139*20651843
2014dec25 19^2*61*391073
2014dec27 5*67*25706921
2014dec29 3*7*17*24122741
2014dec31 5*11*156578519[/code]

Missed this one:
2 + 12 = 14

Now:
(2014 - 13) + 2 = 2003 = Prime

28 ÷ 2 = 14
28/2 = 14

3+11=14


By the way this month is the pi month for the century.

Happy half-tau day!

Ha PI day!

today is 3(14)[SUP]2[/SUP] sort of.
I noted the passing of 1:59 and 26 seconds on my portable timepiece today.