The project also supports actual holiday definitions for many countries. And we do care not only about current holiday rules, but we also care about historic holiday definitions.
Please have a look at the examples in order to understand how easy it is to declare even complex rules for a holiday by using xml-holidays.
This project concentrates on a holiday xml standard and the actual data definitions for holidays on this planet. The standard should be independent of a programming language. Therefore an actual software implementation that parses xml-data is out of the scope of this project.
The project called NumericalChameleon - a free, cross platform, open source and very powerful unit converter entirely written in Java was the first project that actual use the xml-holidays data.
All files in the xml-holidays project are covered by the 3-clause BSD license which is known to be compatible with the GPL. You can use the xml-holidays in both free software and commercial projects. Nonetheless you should read the License.
The idea for this project came from the project called NumericalChameleon - a free, cross platform, open source unit converter that is able to perform holiday calculations since 2004. We have been working closely with the NC folks and we have extracted and enhanced the holiday definitions from the NumerialChameleon project. The members of the NumericalChameleon have been working on an actual implementation in order to read and understand the xml-holidays data.
Sure, we are happy to hear from you. We recommend to read the Guidelines.