Life was different in 1977.
For one thing, I had lots of hair (I mean LOTS of hair) and a 29-inch waist. For another, television went to bed at night in 1977, expecting that you did, too.
In 1977, HBO (which folks still knew stood for Home Box Office) wasn't a 24-hour affair. Like many of your local TV stations back then, HBO signed off overnight.
Good night, sleep tight. And don't let the cable box bite.