Year of the Gregorian Calendar. Positive numbers are A.D. Non-positive are B.C.
assert(Date(1999, 7, 6).year == 1999); assert(Date(2010, 10, 4).year == 2010); assert(Date(-7, 4, 5).year == -7);
See Implementation
Year of the Gregorian Calendar. Positive numbers are A.D. Non-positive are B.C.