T-Minus Last Day Of School 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 Last Day Of School Countdown: T-Minus Last Day Of School Countdown Clock. Are you excited about the Last day of school? Now you can count down the remaining time to summer vacation! You can play the sound of kids cheering Your anticipation will build as you count down the days, hours and minutes.