Carey Development Date Utilities is a package of convenience classes and methods for handling routine date/time operations within Java applications.
You can pull it from the central Maven repositories:
<dependency>
<groupId>us.careydevelopment.util</groupId>
<artifactId>date-util</artifactId>
<version>1.5.0-RELEASE</version>
</dependency>
This code is under the MIT License.