This module provides field wich can be displayed as timer/countdown. Module uses 2 jQuery plugins: County and jQuery Countdown.
This module allow to set an entity property as the target date (for example, properties 'created' and 'changed' of node entity). Also formatter of field have many options to configure the appearance of field.
git clone --branch 7.x-1.x http://git.drupal.org/sandbox/sergei_brill/2040519.git field_timer