2 a.m.
If his door opens in the middle of the night and light cautious footsteps approach his bed, it can only ever be Helga.
Godric will only disturb him at night if it is an emergency. He will slam the door open and rouse Salazar, shaking him roughly and shouting at him to wake up immediately.
Rowena will open the door a little less violently and then splash his face with a stream of cold water from the tip of her wand, telling him in a hushed voice why he needs to be awake.
But if there is a light padding of feet across his room during the night, it is Helga. Sometimes she is trembling from cold or a nightmare, sometimes she is not. But she is always warm and soft, climbing under his sheets where he holds them up for her, snuggling into his waiting arms and sighing softly when she settles down against him.
Salazar will encircle her with his arms and pull her close and those are the nights he will sleep deepest.