Datepicker yearRange option not working

Datepicker yearRange option not working

The datepicker's (UI version 1.8.1) yearRange option is not working as per documentation. No matter which style of yearRange I use, the year in the select box always shows a range from 2000 - 2020,

$('.date').datepicker({
      yearRange: "1990:2050",     
      changeYear: true
})

displays a range from 2000 - 2020,

Try this range:

$('.date').datepicker({
      yearRange: "-20:+1",     
      changeYear: true
})

displays a range from 2000 - 2020,

or

$('.date').datepicker({
      yearRange: "c-20:c+1",     
      changeYear: true
})

still displays a range from 2000 - 2020,