How to use
- Choose the starting date.
- Choose Add or Subtract, and enter years, months, weeks and days.
- Tick Count weekdays only to skip Saturdays and Sundays.
- Read the resulting date, including the day of the week.
Options explained
- Months and years
- Added on the calendar. If the day does not exist in the target month, the last day of that month is used — 31 January plus one month is 28 or 29 February.
- Count weekdays only
- Moves forward or back by the given number of Monday–Friday days. Public holidays are not skipped.
Examples
| Start | Operation | Result |
|---|---|---|
| 2026-09-26 | + 100 days | 2027-01-04 |
| 2026-01-31 | + 1 month | 2026-02-28 |
| 2026-09-25 (Fri) | + 1 weekday | 2026-09-28 (Mon) |
Frequently asked questions
In what order are the values applied?
Years and months first, then weeks and days. For example, 31 January plus 1 month and 1 day is 1 March in a common year (28 February plus one day).
Can I count business days to a deadline?
Yes. Tick Count weekdays only and enter the number of business days. Remember to add public holidays yourself.
Is today's date taken from my device?
Yes. Today is your device's current date in its own time zone.
Privacy
This tool runs entirely in your browser. Your files and text are processed on your device and are never uploaded to our servers.