Days Until a Date

Both dates are converted to midnight UTC and the difference is divided into whole days. Because the math is done in UTC, a daylight saving shift in your local time zone never adds or removes a day from the result.

A negative total means the target date falls before the start date. The magnitude is how many days ago the target was, so -9 days means the target was nine days in the past relative to the start.

Neither endpoint is double counted. The tool measures the span between the two dates, so January 1 to January 8 is 7 days rather than 8. If you need an inclusive count that covers both ends, add one.

The absolute day total is divided by 7 for whole weeks, and the remainder becomes the leftover days. A gap of 198 days shows as 28 weeks and 2 days, and the sign is carried through so a negative total reads as time in the past.

The summary skips a part that is zero. A gap of exactly 14 days shows as 2 weeks with no trailing days, while a 3 day gap shows only days because there are no full weeks to report.

Yes. Neither date has to be today. Set both fields to any dates you like, past or future, and the tool returns the signed gap between them.

The inputs are native date pickers that use the YYYY-MM-DD format internally. You choose from a calendar, so there is no ambiguity about whether a number is a month or a day.

Yes. The calculation uses real calendar arithmetic, so a February 29 in a leap year is counted like any other day and spans that cross a leap day come out right.

Yes. Every calculation runs in your browser. No dates are sent to a server, logged or stored anywhere.