org.xbib.time is based upon the following software:

- Chronic https://github.com/samtingleff/jchronic (MIT License)

- org.joda.time.format https://github.com/JodaOrg/joda-time (Apache 2.0)

- prettytime https://github.com/ocpsoft/prettytime (Apache 2.0)

with improvements by Jörg Prante including

- converted to Java 8 java.time API

- fixing bugs reported by Sonarqube

- refactoring classes

- rewritten code to simplify and ease development