CalendarFormHelper::convertDatesToViewFormat

static function convertDatesToViewFormat($dates)
{
	if (!$dates)
	{
		return $dates;
	}
	$res = [];
	foreach ($dates as $year => $months)
	{
		$res[$year] = [];
		foreach ($months as $month => $days)
		{
			foreach ($days as $day => $time)
			{
				$res[$year][$month - 1][$day] = $time;
			}
		}
	}
	return $res;
}