So,
I don’t know what client code is managing the Date field to be a datepicker.
So to resume… the DateField, in its actual state doesn’t seems to be easily “customizable”. In other words, how can you simply pass it a date range..or any option that a datepicker propose?
Anyway, I’ve “bypassed” my issue by replacing my “Date” Field to a normal Text Field. Then using a small custom javascript to setup this TEXTFIELD to be a datepicker, with all options I need.
I’m sure that there is a “simple” way of getting the right javascript Objet reference and then to customize it like we want. But I never found the JS reference of the datepicker that is used when you choose a “Date” Field in the admin panel.