"Yesterday," Sansa confirms. Jon's touch is one of the few she can stand and actually welcomes and Gods, but she's glad that he's here. If she were all alone, she'd manage, but having him here means that she has someone she can rely upon. Being brought through to the Castle had been stressful, yes, but it wasn't something she couldn't endure. Sansa can endure anything.

"I came straight from Winterfell to this place. You...I haven't seen you in a bit but it certainly hasn't been a year and a half. It must be some of their strange magic, then, that you could be in two places at once."

A few moons, yes, but not a year and a half. It couldn't possibly have been that long since Jon went beyond the Wall.