Any type of anniversary

Somebody returning home after being away. Military service / tour, travel, prison etc.

Add soccer games from all major leagues such as the English Premier League, La Liga, Bundesliga, Serie A etc.

Countdown to the start of a marathon, race, run, cycling, sailing event that a user is taking part / competing in.

I need to know so I can plan how long to make my bucket list

Show how many days left before an examination (or exam period/week)

Allow users to track the numbers of days since certain life events such as starting a diet, stopping smoking, drinking or drugs.

School Prom date

Days until you move to a new home

Number of days until a person's next pay day

Galxy

lots of people get new pets. It'd be nice to have a countdown to getting new kitten or new puppy. Plzzzzzzz

Add "Days until..." the eight Pagan holidays.

This is just fun. Make your own Apocalyptic event... Or count up how many days it's been since December 21st 2012.

Should be an app and has a birthday countdown mode

I sink Easter is the best holiday because you get a lot of candy and because it's the best holiday and you can get with your family and you could just have a little fun on Easter and if I have a YouTube channel so like I'm gonna be doing an Easter video for it and yeah so have a nice day and then going to comment down below if you want to see some more videos and…

Cats