The question strikes him as strange, although perhaps it shouldn't. If he found myself mysteriously thawed from carbonite, he'd probably immediately wonder the same thing.

"I'm afraid that's a bit hard to answer without knowing when you went into carbon stasis," he replies, voice even despite his mounting concern. The Force is suggesting caution, but beneath that is a subtle strain of dangerous confusion that Kenobi recognizes from other caged animals.

He doesn't approach, but instead keeps what he hopes is a safe distance. "Could you tell me the most recent date you recall? Perhaps then I could give you a better idea."