The locale property (string or DayPilot.Locale) specifies the culture settings used for date parsing and formatting.
DayPilotDayPilot.DatePicker.locale"en-us"You can use either a locale id (string) or a DayPilot.Locale object.
const picker = new DayPilot.DatePicker({
target: "start",
locale: "de-de",
// ...
});
picker.show();