Thanks for creating this issue.
I am largely torn between two methods of conv...

Thanks for creating this issue.

I am largely torn between two methods of conversion right now. As you might have seen, there are two things responsible for rendering the popup picker–the field widget, and the form element under it. I am wondering where I should actually convert the dates.

It's easy to convert the dates in the widget, but a side effect of that is that the form element would only return dates in another calendar, never a date you can actually use for storage (maybe that's a good thing). Alternatively, we can handle the conversion in the TaarikhDate element itself, which is slightly tricky as I am not very sure how to cleanly access the taarikh plugin manager from there.