# DAYS\_AGO

### Description

`DAYS_AGO` calculates the number of days it has been since a specific date. The date can be either given as an information or a text in [ISO8601 format](https://docs.atfinity.io/rule-language/operators/date-operators/..#iso8601-format).

### Example

To check wether a case has been opened more than a week ago, you could use the following rule:

```
DAYS_AGO(CASE.created_at) >= 7
```