locale of scheduler

hi
i want to use scheduler in my project but i want to know if can to change or add locale
for scheduler. for example hijri calendar???

It possible to use one of existing locales, or add a custom one
javaplanner.com/docs/localization.html
docs.dhtmlx.com/scheduler/localization.html

But it will change only text labels
There is no way to change the calendary system ( such as hijri calendar )