After changing date format still getting error

[frank18]

There are actually three (3) files that come into play here:

1. /YOUR_ADMIN/includes/languages/english.php, as you've described
2. /includes/languages/YOUR_TEMPLATE/english.php, where you'll enter the updated define statements and the re-arrangement of the zen_date_raw function
3. /includes/languages/english.php, which is loaded after the template-version, so all the locale-setting statements that you've identified for the template-override directory must be specified here for those settings to take effect.

Hmm... in more than 8 years of using ZC for many stores, I never changed anything in the core english.php file and always had the desired result using the template override file, no problems whatsoever. So, I am not so sure if it is necessary to change the locale settings in the core english.php file as well.