If you get the latest code you could try to use it with only the datepicker and you could leave out the time which will make it midnight on the date ie the beginning of the date or you could manually enter the time after picking the date.
To make it work copy the mojoDatePicker.config file and rename it to mojoDatePickerCustom.config
Then in the copy change the dfeaultProvider like this: defaultProvider="CalendarDatePickerProvider"
Then in user.config add this:
<add key="mojoDatePickerConfigFileName" value="mojoDatePickerCustom.config" />
Then force the site culture to Persian ie:
<add key="UseCultureOverride" value="true" />
<add key="site1culture" value="fa-IR" />
<add key="site1uiculture" value="fa-IR" />
Then in your skin add this in style.config
<file cssvpath="/ClientScript/jquery.calendars.package-1.1.4/jquery.calendars.picker.css" imagebasevpath="/ClientScript/jquery.calendars.package-1.1.4/">none</file>
to add the needed css for the datepicker
In my testing it works ok except for the fact that it doesn't support picking a time.
Hope that helps,