*Workflows › Reference › Functions › Date*

# Days between

> A function of the expression language. Category: Date. `dateDiff`.

## Signature

```text
dateDiff(dateValueExpression, dateValueExpression)
```

Counts calendar days; it is positive when the second date is later than the first.

## Where it can be used

Its result can be used where the editor expects a value of these types.

- number

More in [Functions](https://docs.filmo.io/workflows/data-and-expressions).

FUNCTION `dateDiff`

## Arguments

| Name | Type | Required | Description |
| --- | --- | --- | --- |
| `arg1` | date | Yes |  |
| `arg2` | date | Yes |  |

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Canonical URL: https://docs.filmo.io/workflows/reference/functions/datediff  
Last updated: 2026-10-25