That meaning is a human construction. It already doesn't mean where the sun is in the sky in the current location, it means in a single specific location per ti

That meaning is a human construction. It already doesn't mean where the sun is in the sky in the current location, it means in a single specific location per timezone. We could just agree that it means "where the sun is in the sky in Greenwich, UK"[1] [1] Notionally. Obviously the sun is not often in the sky in London.