Why Zero is an Even Number

Zero is an even number. Unknown to many. The first even number is usually regarded as 2. But let us examine the definitions of even number  to see whether Zero fit to be called an even number.

1) Now, the basic definition of an even number is something that can be divided by 2.
        Well, zero can be divided by 2.
Zero divided by 2 is 0. 
In fact, in that sense, it is the most even number. 
     In ancient times they had this idea of things being singly even or doubly even. 
  So 12 would be doubly even because you can divide by 2.
                   12/2 = 6
 and then     6/2 = 3
 Well, by that sense, 0 can be divided by 2 and 2 and 2 and 2 and so on....
        0/2 = 0
        0/2 = 0
        0/2 = 0

2) The correct definition of an even number is it's a multiple of 2.
 Something times 2.
       2 * ?
Then there is no problem with that. It's 0 times 2. Great!!

3) Then again, then definition for an even number might be, it fits between two odd numbers. 
   0 sits between -1 and 1. It perfectly fits. 

4) There are some arithmetic rules. If you add two even numbers together, you get an even number.
 Well, that works. 
        0 + 4= 4, an even number again. That's what we want. 

 We're saying 0 is even. It follows every definition of an even number. In fact, if it wasn't even, then it would break our rules of arithmetic, which would be a disaster and ugly.