public function getCalendarFormats($locale = null)
    {
        return [
            'sameDay' => $this->getTranslationMessage('calendar.sameDay', $locale, '[Today at] LT'),
            'nextDay' => $this->getTranslationMessage('calendar.nextDay', $locale, '[Tomorrow at] LT'),
            'nextWeek' => $this->getTranslationMessage('calendar.nextWeek', $locale, 'dddd [at] LT'),
            'lastDay' => $this->getTranslationMessage('calendar.lastDay', $locale, '[Yesterday at] LT'),
            'lastWeek' => $this->getTranslationMessage('calendar.lastWeek', $locale, '[Last] dddd [at] LT'),
            'sameElse' => $this->getTranslationMessage('calendar.sameElse', $locale, 'L'),
        ];
    }