So how did you enjoy your 47-hour weekend?

There was no turning the clock back now. Which reminded him: tonight they had to turn the clocks back. Last time there had been chaos, when Simon had asked the teachers to remind their students to “turn your clocks back an hour” when he meant “turn your clocks forward an hour”. Most teachers realised it was just a slip of the tongue, but one or two had taken Simon at his word, and duly passed on the message verbatim to their students and anybody else who would listen to them; with predictable consequences. Even today, nearly six months on, you occasionally saw bemused students who, having arrived two hours late for their class, would walk up and down the corridor, wandering and wondering, “Where did they all go?”.

(dayrealing, ch.27, "Private Universe")