Add Months to Date Calculator
Add a number of months to any date and get the resulting date and weekday, with short months handled.
Independently verified for accuracy
Calculator by Toolsloft ↗- Result date
- 2026-08-20
- Day of week
- Thursday
Add a number of months to a date and see where you land, along with the weekday. Good for subscription renewals, warranty periods, and payment schedules. When the target month is shorter, the day is clamped to that month end.
How this is calculated
Months are added on the calendar, keeping the same day number where possible. When the target month is shorter than the start day, the day is clamped to the last day of that month, so January 31 plus one month becomes the end of February.
How to use
- Enter the start date in YYYY-MM-DD format.
- Enter the number of months to add.
- Read the resulting date and its weekday.
Examples
- Month-end clamp:
2026-01-31 + 1 month = 2026-02-28 - Half a year:
2026-07-20 + 6 months = 2027-01-20 - Three months:
2026-11-15 + 3 months = 2027-02-15
FAQ
- What happens when the next month is shorter?
- The day is clamped to the last day of the target month. January 31 plus one month becomes February 28, or February 29 in a leap year.
- What date is 6 months from now?
- Enter today and 6 months. The tool keeps the same day number where the month allows and shows the result.