2.1.163 [ECMA-262-1999] Section B.2.4, Date.prototype.getYear ()

V0264:

When the getYear method is called with no arguments the following steps are taken:

  1. Let t be this time value.

  2. If t is NaN, return NaN.

  3. Return YearFromTime(LocalTime(t))# - 1900#.

For JScript 5.x, Date.prototype.getYear is functionally identical to Date.prototype.getFullYear.