Filme Canon
Na adaptação para o cinema, Hogwarts tem uma enorme Torre do Relógio no centro do pátio principal. Parece soar a hora e a meia hora ao longo do dia
Canon do livro
Eles têm relógios nas paredes
The following week dragged by. Wednesday night found Hermione and Harry sitting alone in the common room, long after everyone else had gone to bed. The clock on the wall had just chimed midnight when the portrait hole burst open. Ron appeared out of nowhere as he pulled off Harry’s Invisibility Cloak. He had been down at Hagrid’s hut, helping him feed Norbert, who was now eating dead rats by the crate.HP:Philosopher's Stone - Chapter 14
e relógios verticais
‘No, no, no,’ said Hermione. ‘No, we’re not. Why don’t you go to bed, Neville?’ Harry looked at the grandfather clock by the door. They couldn’t afford to waste any more time, Snape might even now be playing Fluffy to sleep. HP:Philosopher's Stone - Chapter 16
Presumivelmente, esses relógios são literalmente mecanismo de relógio, que não seriam afetados por restrições de magia na eletrônica.
Nossos três heróis usam relógios de pulso
- Ron:
‘Nearly six,’ said Ron, checking his watch and then staring down the drive which led to the front gates. ‘How d’you reckon they’re coming? The train?’
- Harry:
Harry crept past them to the portrait hole and waited for a minute or so, keeping an eye on his watch. Then Hermione opened the Fat Lady for him from outside as they had planned. He slipped past her with a whispered ‘Thanks!’ and set off through the castle.
- Hermione:
Hermione was tugging at his sleeve, staring at her watch. ‘We’ve got exactly ten minutes to get back down to the hospital wing without anybody seeing us – before Dumbledore locks the door’
Para o registro, pode haver relógios mágicos (Dumbledore parece ter um), mas o resto do personagens parecem confiar em relógios mundanos e relógios de pulso, os quais parecem funcionar bem dentro de Hogwarts:
Professor McGonagall pulled out a lace handkerchief and dabbed at her eyes beneath her spectacles. Dumbledore gave a great sniff as he took a golden watch from his pocket and examined it. It was a very odd watch. It had twelve hands but no numbers; instead, little planets were moving around the edge. It must have made sense to Dumbledore, though, because he put it back in his pocket and said, ‘Hagrid’s late. I suppose it was he who told you I’d be here, by the way?’
Piradas lhe dirão o tempo se você tiver azar
Peeves cackled.
‘Wandering around at midnight, ickle firsties? Tut, tut, tut. Naughty, naughty, you’ll get caughty.’
Os retratos também podem informar o tempo de forma limitada
By the time he got up to the portrait of the Fat Lady and pulled off his Invisibility Cloak, he was not surprised to find her in a most unhelpful mood. ‘What sort of time do you call this?’ ‘I’m really sorry – I had to go out for something important –’ ‘Well, the password changed at midnight, so you’ll just have to sleep in the corridor, won’t you?’