Days Until Date Calculator
Count days between any two dates — positive for future, negative for past. Nothing is uploaded.
Count days until any future (or past) date
Enter a start date and a target date to see how many whole days separate them. The start date defaults to today so you can immediately answer questions like "how many days until my deadline?" or "how many days since that event?" The result is signed: a positive number means the target is ahead, a negative number means it has already passed. All math runs in UTC so the answer is the same regardless of your local timezone.
The tool also shows approximate weeks (rounded down) and approximate months (days divided by 30.44, rounded down) for quick orientation. Nothing is sent to a server — the calculation happens entirely in your browser.
FAQ
Why does it show a negative number? A negative result means the target date is before the start date. Swap the two inputs if you want a positive countdown.
Does it account for time zones? No — the tool works with calendar dates only, using UTC arithmetic. The day boundary is always midnight UTC.
Is the month count exact? No. "Approx. months" divides the day count by 30.4375 (average Gregorian month length) and floors it. Use the Date Difference Calculator for an exact years/months/days breakdown.