Date Calculator
Add or subtract years, months, and days from any date.
Resulting date
—
Day of week
—
About this tool
Add or subtract any number of years, months, and days from a starting date to find out exactly what date you'll land on — handy for deadlines, contract terms, or planning ahead.
Frequently asked questions
- How are months handled when the day doesn't exist in the target month?
- If adding months lands on a day that doesn't exist (for example, adding one month to January 31st), the date is clamped to the last valid day of that month.
- Can I combine years, months, and days in one calculation?
- Yes — all three are applied together in a single step (years and months first, then days), so you can mix them freely.
- What if I leave the start date empty?
- Today's date is used automatically as the starting point.