The duodecimal system (also known as base 12 or dozenal) is a positional notation numeral system using twelve as its base.
base 12
base 12 is a positional numeral system with twelve as its base. It uses 12 different digits for representing numbers. The digits for base 12 could be 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, a, and b.