dhtmlxCalendar set the year range?

When the calendar pops up and i click on the Year, i get a list of years from 2016 to 2027 are the options i have, is there a way to specify an older start year for that range? my web app is a historical app so i need more previous years and zero future years. i.e. i’d be very happy with 2000 to 2019

Looks like i hadn’t quite implemented it correctly. Once i did my issue is resolved.