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<?php echo preg_replace_callback('/(\d\d?:\d\d)-(\d\d?:\d\d)/', function($match){ return ' ' . date('H:i', strtotime($match[1])) . '-' . date('H:i', strtotime($match[2])); }, 'mo-sa9:00-20:00uhr');
Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.21, 8.5.0 - 8.5.6
mo-sa 09:00-20:00uhr

preferences:
76.28 ms | 1248 KiB | 4 Q