# DATEADD

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Adds a whole number of days to a date. Use a negative number to subtract days.

## Example

```js
DATEADD($received_on, 3)
```

## Parameters

- date: valid date from `0001-01-01` through `9999-12-31` in `YYYY-MM-DD` format, such as a
  `DateField` value
- days: whole number of days to add (can be negative)

## Returns

The resulting date as a `YYYY-MM-DD` string. Returns `null` when either argument is blank, so a
calculation stays empty until the date is filled in.

`DATEADD` counts calendar days, so daylight-saving changes never shift the result. A malformed date,
such as `2026-02-30`, a fractional number of days, or a result outside the supported date range
raises a calculation error.