Base64 is a very useful base, basicly.
I expect most of you know what it is, so I won't much spend time going over it.
Basically, in Base64, 0=A, and 1=B, and so on, until Z=25, a=26, etc.
This is going to BLOW YOUR MIND.
The Base64 character J, is equal to 9.
In Base64, DAY[J] = DAY