theme – How to sort a row with custom PHP in PHP see custom field?

Using Drupal 7.61, views and PHP filter

I have a custom PHP field configured in views to show time zones, and I would like it to be orderly, but I'm not sure what custom PHP code to put there …

The code in the field is:

  field_time_zone);
echo date ("H: i");
?>

My goal is to make time zones show in numerical order

enter the description of the image here

enter the description of the image here