wpsnoop wp-content/plugins/cssable-countdown/includes/functions/list_of_timezones.php file is used by 1 plugin/theme
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This page provides some information on the wp-content/plugins/cssable-countdown/includes/functions/list_of_timezones.php file and a list of plugins and themes that implement it.
The following plugin create a file called wp-content/plugins/cssable-countdown/includes/functions/list_of_timezones.php: