Since version 2.4 this plugin has a goal that checks that your changes.xml file has a valid release date.
You can attach this goal to the verify phase if you want the check to be performed automatically when you build the project.
Configure the plugin like this to tell it to check your changes.xml file.
<project> ... <build> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-changes-plugin</artifactId> <version>2.9</version> <executions> <execution> <id>check-changes</id> <phase>verify</phase> <goals> <goal>changes-check</goal> </goals> </execution> </executions> </plugin> </plugins> </build> ... </project>