Add or subtract days from a date
Pick a start date and a number of days, weeks, months or years to add or subtract. The result shows the exact date and its day of the week; you can also count business days only.
- Checked on thousands of cases
- Updated November 1, 2026
Resulting date
Sunday, December 6, 2026
Quick challenge
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Test yourself: every answer is computed by the tool, and the wrong choices are the most common traps.
How it works
Days and weeks are added on the calendar, one day at a time, across months and leap years. Months and years keep the same day of the month when it exists; otherwise the last day of the month is used, so January 31 plus one month is February 28 (or 29 in a leap year). With 'Business days only', Saturdays and Sundays are skipped; public holidays are not removed.
Dates before and after today (November 6, 2026)
| Days | Before | After |
|---|---|---|
| 7 | Oct 30, 2026 | Nov 13, 2026 |
| 10 | Oct 27, 2026 | Nov 16, 2026 |
| 14 | Oct 23, 2026 | Nov 20, 2026 |
| 15 | Oct 22, 2026 | Nov 21, 2026 |
| 21 | Oct 16, 2026 | Nov 27, 2026 |
| 30 | Oct 7, 2026 | Dec 6, 2026 |
| 45 | Sep 22, 2026 | Dec 21, 2026 |
| 60 | Sep 7, 2026 | Jan 5, 2027 |
| 90 | Aug 8, 2026 | Feb 4, 2027 |
| 100 | Jul 29, 2026 | Feb 14, 2027 |
| 180 | May 10, 2026 | May 5, 2027 |
| 365 | Nov 6, 2025 | Nov 6, 2027 |
Frequently asked questions
What date is it in 90 days?
Enter today's date (the default) and 90 days. The table on this page also lists the dates 7, 30, 90, 180 and 365 days before and after today.
What happens when I add a month to January 31?
February has no 31st, so the result is the last day of February: February 28, or February 29 in a leap year.
How are business days counted?
Only Monday to Friday count. Starting on a Friday, 1 business day later is the following Monday. Public holidays vary by country and are not removed.