OSTimer is a fairly straightforward countdown module that allows you to countdown to a particular event. You can choose the year, month, day, hour, minute and even the second at which your event begins. OSTimer is designed to be very easy to setup. The OSTimer Pro version include 3 new theme styles to change the design of the module.
To access, go to Extensions > Modules.
Create a new OSTimer module, or edit an existing one.
In addition, you can choose a custom color to apply to the below theme styles.