==== Regional definitions
The following definition files are included in the default
installation:

* holidays/au
* holidays/ca
* holidays/de
* holidays/dk
* holidays/es
* holidays/europe
* holidays/fr
* holidays/gb
* holidays/ie
* holidays/is
* holidays/it
* holidays/lv
* holidays/mx
* holidays/nl
* holidays/north_america
* holidays/united_nations
* holidays/us
* holidays/za