The file wp-content/plugins/zyx-analog-clock/includes/shortcodes.php contains the definition for the analog_clock shortcode.
wp-content/plugins/zyx-analog-clock/includes/shortcodes.php
[analog_clock]: Source code
By the Web Warlock, Monday, 31/May/2010 19:00
Source code of the function the_clocked_time_shortcode, used to add the analog_clock shortcode of the ZYX Classical Circular Clock plugin.