It seems there is some problem with the datePickerConfig of date type. Options like theme, reposition or position does not work.
I have checked the Pikaday source code and it seems that the options are received ok, but when the date picker is rendered does not complaint with the options set.
Really I have tried to figure out where is the error but I didn’t found it…
I think that we will be adding all (or most) options in the same time if they won’t conflict with our library but there’s no fix/change date for this issue yet.