◷Free
Add calendar months
Shift calendar months, clamping to the last valid day of the destination month.
Calendar months are added to the starting year and month while preserving the day when possible. Adding one month to 2024-01-31 returns 2024-02-29 because February has no day 31.
How to use
- Enter your text, values, or image.
- Adjust the options and run the tool.
- Copy or download your result.
Worked example
Example input
Starting date: 2024-01-31 Months to add: 1
Example result
{
"date": "2024-02-29"
}Limitations and details
The month offset must be an integer within ±100,000 and the result must be in years 0001–9999; this is not a fixed-day-duration addition.
Inputs and options
- Starting date
- Date
- Months to add
- Number · Minimum: -100000 · Maximum: 100000
Frequently asked questions
Is this tool free and private?
Yes. All 300 tools are free in this phase. Processing happens in your browser; your input and files are not sent to our servers.