Date Add or Subtract Days
Add a signed number of calendar days to a Gregorian date. Enter your own values; the result updates only when you run the tool.
Your inputs
Use consistent units. Examples appear below each field.
Your result
Ready when you are.
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Fill in the input panel and run the tool. Your answer and its calculation method will appear here.
How date add or subtract days works
Add a signed number of calendar days to a Gregorian date.
Try this example
- Start date
- 2026-01-01
- Days to add (negative to subtract)
- 30
2026-01-31
Good to know
Which values should I enter?
Use the units shown in each label. Add a signed number of calendar days to a Gregorian date.
Are my inputs saved automatically?
No. Recent tools contain tool names only. Inputs and results are stored only when you explicitly choose Save while signed in.
Can I share this tool?
Share the tool link. It opens a blank tool and does not include your private inputs or result.
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