share/GB-AL.xml
<?xml version="1.0" encoding="UTF-8" ?>
<holidays xmlns="https://heigl.org/holidays"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="https://heigl.org/xml/xsd/holidays.xsd"
xmlns:xi="http://www.w3.org/2001/XInclude">
<date day="15" month="12" free="true">Homecoming Day</date>
<xi:include href="GB.xml" parse="xml" xpointer="xpointer(*/*)">
<xi:fallback></xi:fallback>
</xi:include>
</holidays>