Counting the time between two dates is trickier than it looks, because months vary in length and leap years add a day. This calculator gives you the exact gap as a total, in weeks, and as a years-months-days breakdown.
How the gap is measured
The total-days figure is the raw count between the two dates. The years/months/days breakdown counts whole years first, then whole months, then leftover days — the same way you'd describe someone's age. The order of the two dates doesn't matter; the calculator uses the absolute difference.