Date Difference Calculator

Need to know how many days are between two dates? Our date difference calculator gives you the exact number of days, weeks, months, and years between any two dates. This is useful for a wide range of purposes: calculating how long until a deadline, working out how many days of holiday you have taken, finding out how long a project lasted, or simply satisfying curiosity about how many days until Christmas. The calculator also shows the result broken down into the largest meaningful units — for example, 1 year, 3 months, and 12 days — so you get a human-readable answer rather than just a raw number of days.