Kentucky Revised Statutes 18A.190 provides that "Good Friday" is 1/2 day "state holiday".
It is specifically mentioned as such (i.e. "Good Friday"), which of course is a purely sectarian religious holiday celebrated only by Christians. It is difficult then for me to find a "secular purpose" in why Kentucky observes this day as a state holiday. The other holidays mentioned in the statue are designated by date(s) or are clearly non-sectarian (e.g. MLK, Jr. day).
Isn't this holiday something that could be legally challenged as serving no secular purpose?