Why does the first sentence turn out to be ironic?
In the living room the voice-clock sang, "Tick-tock, seven o'clock, time to get up, time to get up, seven o'clock!" as if it were afraid that nobody would."
It really isn't 7:00.
There is no one in the house to get up or hear the clock.
The clock says tick tock instead of actually ticking.
The story is set in the future, but clocks are still used.