How do I set a starting date in Jquery datetimepicker taken from a query using coldfusion?

I need to set a starting date in datetimepicker. How can I do that ? I checked with minDate and StartDate. But I couldn't set the starting date.

Sample Code :

StartDate = new Date("March 20, 2014");
jQuery('.datetimepicker').datetimepicker({step:30});
jQuery('.datetimepicker_notime').datetimepicker({
        timepicker:false,
        format:'m/d/Y',
        minDate : StartDate,
        step:30
}); 

According to the docs for this jQuery plugin (if this is the one that you are using) the start date can be set like this:

Date Time Picker start date #

javaScript

jQuery('#datetimepicker_start_time').datetimepicker({
    startDate:'1971/05/01'
});

startDate - if input value is empty, calendar set date from this starDate

examples:

{startDate:'1987/12/03'}
{startDate:new Date()}
{startDate:'+1970/01/02'} // tomorrow
{startDate:'08.12.1986',formatDate:'d.m.Y'}

Adding this to your example it would look like this:

StartDate = '2014/03/20';
jQuery('.datetimepicker').datetimepicker({step:30});
jQuery('.datetimepicker_notime').datetimepicker({
    timepicker:false,
    format:'m/d/Y',
    startDate: StartDate,
    step:30
});