# BEFORE

### Description

`BEFORE` takes two dates, from either an information or in [ISO8601 format](https://docs.atfinity.io/rule-language/operators/date-operators), and checks if the first one comes before the second. If it does, true will be returned. Otherwise false will be returned.

### Example

```
e is Entity
BEFORE(e.date_of_founding, '2016-02-29')
```

This expression checks whether a company was founded before 29th February 2016 (the actual founding date of Atfinity AG; so also if it's older than Atfinity). If it was, this expression will return true.