// From 2.12.0 onward moment.updateLocale('en', { weekdaysMin : String[] }); moment.updateLocale('en', { weekdaysMin : Function });

// From 2.8.1 to 2.11.2 moment.locale('en', { weekdaysMin : String[] }); moment.locale('en', { weekdaysMin : Function });

// Deprecated in 2.8.1 moment.lang('en', { weekdaysMin : String[] }); moment.lang('en', { weekdaysMin : Function });


Locale#weekdaysMin should be an array of two letter weekday abbreviations. The purpose of these is for things like calendar pickers, thus they should be as small as possible.

moment.updateLocale('en', {
    weekdaysMin : ["Su", "Mo", "Tu", "We", "Th", "Fr", "Sa"]
});

Locale#weekdaysMin can be a callback function as well.

moment.updateLocale('en', {
    weekdaysMin : function (momentToFormat, format) {
        return weekdaysMin[momentToFormat.day()];
    }
});