Add 30 days
Input: 2026-06-07 + 30 days
Output: 2026-07-07
30 days after 7 June 2026 is 7 July 2026.
Date calculator
Add or subtract a number of days from any date to get the resulting date and weekday.
Result:
Formula and algorithm
- Result = start date ± number of days, computed on a UTC calendar.
- Leap years and month lengths are handled automatically.
- Use the subtract option to go back in time.
Worked examples
Subtract 7 days
Input: 2026-06-07 − 7 days
Output: 2026-05-31
A week before 7 June 2026 is 31 May 2026.
Across a leap day
Input: 2024-02-28 + 1 day
Output: 2024-02-29
2024 is a leap year, so the next day is 29 February.
FAQ
Can I subtract days?
Yes. Choose subtract to reach a past date, or add to reach a future date.
Does it count weekends?
Yes, every calendar day is counted. For business days only, use a working-days tool.
What format is the result?
An ISO date (YYYY-MM-DD) plus the day of the week.
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Updated: June 7, 2026