Date.setYear() — set the year field of a Date
An integer that is set as the year value (in local time) for the Date object
date. If this value is between 0 and 99, inclusive, 1900 is added to it and it is treated as a year between 1900 and 1999.
The millisecond representation of the adjusted date. Prior to ECMAScript standardization, this method returns nothing.
setYear() sets the year
field of a specified Date object, with special behavior for years
between 1900 and 1999.
As of ECMAScript v3, this function is no longer required in