T-Minus Birthday Countdown Cost: $9 Get the full version     Trial version     Developer's Website Contacting third-party download site please wait. If your download does not start, click here, or get the full version Descriptions T-Minus Birthday Countdown: Your anticipation will build as you count down the days, hours and minutes. A software program for your PC that's fun and easy to use.The Countdown Clock sits on your desktop so you can monitor the time until your special event.