# Date Calculator

URL: https://phishdestroy.io/developer-tools/date-calculator
Category: Misc
Where it runs: Runs locally (nothing you enter is uploaded)

Pick a start and an end date to get the days between them, the same span in weeks and days, and the difference in calendar months. Below that, add or subtract a number of days from the start date.

## Example input

Days until 1 January 2030

```
2030-01-01
```

Sets the end date; with the start date left at today, the result shows how many days, weeks and calendar months remain until 1 January 2030.

## FAQ

### How are the days and months counted?

Days are the end date minus the start date, so the start day itself is not counted and the number is negative if the end is earlier. Months (approx) only compares the year and month, so 31 January to 1 February counts as 1 month.

### How do I subtract days?

Enter a negative number, such as -90, in the add/subtract field and press Add to start date. The result is an ISO date (YYYY-MM-DD) followed by the date written out; in time zones west of UTC, such as the Americas, the written-out date can be one day early, so go by the ISO date.

### Is anything sent to a server?

No. The dates are calculated by JavaScript in this page; nothing is uploaded.

## Related tools

- [Duration Converter](https://phishdestroy.io/developer-tools/duration-converter)
- [Unix Timestamp Converter](https://phishdestroy.io/developer-tools/unix-timestamp-converter)
- [Stopwatch & Countdown Timer](https://phishdestroy.io/developer-tools/stopwatch-timer)
- [Progress ETA Calculator](https://phishdestroy.io/developer-tools/eta-calculator)
- [Percentage Calculator](https://phishdestroy.io/developer-tools/percentage-calculator)

All tools: https://phishdestroy.io/developer-tools