I was just thinking the other day about the status of the tagesschau in Germany: a daily news programme by ARD (state-sponsored Channel 1). They have several programmes a day, but the one I'm talking about is the one from 20:00–20:15.
This has become somewhat of a fixed part of German culture: Stella said that she wouldn't call older people during that time since they would, most likely, be watching the news then. And when children have a certain age, they're allowed to stay up until tagesschau is over, but no later.
And it had a big influence on private television companies as well: even if they do not have news at that hour, the main film of the evening begins at quarter past eight. Apparently, some channels tried to start the evening at eight or half-past seven or so, but they never got enough viewers since the timeslot from eight to quarter past eight is "sacred" for many viewers, who'll switch to the tagesschau even if they don't watch state-sponsored TV the rest of the day—and if that would interrupt the feature film or cause them to miss the first bit, they'd rather watch something else instead that doesn't start until tagesschau is over.
It's possible that the tagesschau doesn't have the market share it used to, but things still start at 20:15 in nearly all channels.