It's 2 seconds after midnight, and Sky News has just wished me Good Morning. That's just wrong. It's only morning in the Land of Pedants. For the rest of us it's still evening.
Don't ask me exactly when morning begins – I just know that it's after I've gone to bed. And dawn might also be involved. Or perhaps at 2am – the time they choose for changing the clocks when summer time starts or ends.
I recently learned that in Japan they extend the 24 hour clock when, for example, giving times for train journeys that end after midnight. So a train might depart City A at 22.30 and arrive in City B at 25.30.