Deprecated: Return type of Joomla\CMS\Date\Date::format($format, $local = false, $translate = true) should either be compatible with DateTime::format(string $format): string, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /htdocs/sit-in.pl/libraries/src/Date/Date.php on line 281

Deprecated: Return type of Joomla\CMS\Date\Date::setTimezone($tz) should either be compatible with DateTime::setTimezone(DateTimeZone $timezone): DateTime, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /htdocs/sit-in.pl/libraries/src/Date/Date.php on line 398