Wrong sign

I suspect that The Lady thinks I'm crazy for allocating any brain-space to this:  but, I dislike incorrect language.   

This is a sign at the local McDonald's:

So:  if it said "Open 24/7" or "Open 24-7", that would be correct:   it's repeating a common phrase -- which omits the (implied) units (hours per day; days per week).

And if it said "Open 24 hours, 7 days", I would accept that:  it would mean "open all the time".


BUT -- because they included the units ("hours"), at the end of the "24/7" -- it now reads "Open 24/7 hours" -- which is 3.43 hours.

That's not very long.


--GG