Having an optional day matcher we can handle the 12:00-12:00 case by by doing `count($match) >= 3`

```php
$dateRegex = "/(\d{2}:\d{2})-(\d{2}:\d{2})(\w+)?\s*(?:(\d{2}\/\d{2})-(\d{2}\/\d{2}))?.*/";
```