DEADLINE TIMER is a handy gnome shell extension that displays the remaining time until any important deadline. With this extension, you can easily keep track of the time left until your important dates right from your desktop.
The countdown is displayed in the panel, so it doesn't take up space on your desktop and is always easily accessible.
Stay on top of your deadlines with DEADLINE TIMER and never miss an important date again!
Tested on Gnome Shell v48.