# Functions in Amazon Athena
<a name="functions"></a>

For changes in functions between Athena engine versions, see [Athena engine versioning](engine-versions.md). For a list of the time zones that can be used with the `AT TIME ZONE` operator, see [Use supported time zones](athena-supported-time-zones.md).

**Topics**
+ [Athena engine version 3](functions-env3.md)