The modulo (or "modulus" or "mod") is the remainder after dividing one number by another.

Example: 100 mod 9 equals **1**

Because 100/9 = 11 with a remainder of **1**

Another example: 14 mod 12 equals **2**

Because 14/12 = 1 with a remainder of **2**

12-hour time uses modulo 12 (14 o'clock becomes 2 o'clock)

It is where we end up, not how many times around.