Template:Music festivals established in the YYY0s category header

{{Documentation|content= To make a category of the form "Music festivals established in the YYY0s"

e.g. Category:Music festivals established in the 1970s

Usage
No parameters are needed.

If a Category:YYY0s music festivals exists, then this template will make that a parent category. Otherwise, it will make Category:YYY0s in music a parent category. }}