These include official functions and flying the national flag.
The latter are actually Christian religious holidays, which are equivalent to any Sunday: companies and schools are closed, but there is no official celebration.
[1] Two of them always fall on Sunday, thus, there are effectively at most 13 work-free days in Slovenia.
State holidays that are work-free are shown in pale green, while work-free days that are not state holidays (coinciding with Christian religious holidays) are shown in blue.
In addition to these, several other holidays are traditionally and popularly celebrated by the people of Slovenia, although not being work-free.