What potential issues could arise when formatting dates in PHP output?

One potential issue that could arise when formatting dates in PHP output is displaying the date in an incorrect format. To solve this issue, you can use the `date()` function in PHP to format the date according to your desired format. Make sure to specify the correct format parameters such as 'Y' for the year, 'm' for the month, and 'd' for the day.

$date = '2022-01-15';
$formatted_date = date('Y-m-d', strtotime($date));
echo $formatted_date;