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: T-Minus Birthday Countdown Clock. Looking forward to your birthday or the birthday of someone special? Now you can count down the time to the fun! You can play our Birthday song or insert a song of your own!Your anticipation will build as you count down the days, hours and minutes.