DayCheck is a simple web app I made that answers one question: how much time has passed since any date. You just pick a date, hit calculate, and it shows you the difference in days, weeks, months, and years. It’s good for figuring out things like how long you’ve been at a job, how many days until your birthday, or how much time was between two events.

It has a clean and colorful interface with a few theme options and works on any device in the browser. I added an “On This Day” feature too so you can see what happened in history on the date you pick.

The whole point is simplicity. No learning curve, nothing complicated. Just pick a date and get your answer. It’s the kind of thing you’d bookmark and pull up whenever you don’t feel like doing the math yourself.

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