The dayNamesShort property (string[]) holds the abbreviated day-of-week names used by a locale.
DayPilot.Locale.dayNamesShort["Su", "Mo", "Tu", "We", "Th", "Fr", "Sa"]The array items are ordered from Sunday through Saturday.
This value is used for the "ddd" date-formatting pattern supported by DayPilot.Date.toString().
const locale = new DayPilot.Locale("es-custom", {
dayNamesShort: ["Do", "Lu", "Ma", "Mi", "Ju", "Vi", "Sa"],
// ...
});
DayPilot.Locale.register(locale);