Calculating the duration between two dates is needed for project planning, age verification, contract terms, anniversaries, and countless other scenarios. This date difference calculator computes the exact span between any two dates, showing the result in total days as well as broken down into years, months, and days. It correctly handles varying month lengths and leap years, so you get an accurate count regardless of which months or years are involved. Use it to calculate how many days until an event, how long a project took, or how much time has passed since a milestone, all with a single calculation.