jQuery UI: Datepicker set year range dropdown to 100 years

Try the following:-

ChangeYear:- When set to true, indicates that the cells of the previous or next month indicated in the calendar of the current month can be selected. This option is used with options.showOtherMonths set to true.

YearRange:- Specifies the range of years in the year dropdown. (Default value: “-10:+10″)

Example:-

$(document).ready(function() {
    $("#date").datepicker({
        changeYear:true,
        yearRange: "2005:2015"
    });
});

See:- set year range in jquery datepicker

You can set the year range using this option per documentation here http://api.jqueryui.com/datepicker/#option-yearRange

yearRange: '1950:2013', // specifying a hard coded year range

or this way

yearRange: "-100:+0", // last hundred years

From the Docs

Default: "c-10:c+10"

The range of years displayed in the year drop-down: either relative to today's year ("-nn:+nn"), relative to the currently selected year ("c-nn:c+nn"), absolute ("nnnn:nnnn"), or combinations of these formats ("nnnn:-nn"). Note that this option only affects what appears in the drop-down, to restrict which dates may be selected use the minDate and/or maxDate options.