Kurumi thought for a moment before raising her hand. "I don't see why they wouldn't be useful. They tell time based on the movement of the sun, so unless the sun were to vanish...which would be bad for us all. As long as you are able to locate North, which you could do easily with a Point Me spell, you can position the sundail properly and get a pretty accurate reading." Besides, if you were stuck in the middle of no where, a sundial could be helpful. A little impractical, but still helpful. "Since actual time telling devices have been invented, people do not feel the need to use sundials, considering them rather primitive. There is also a small margin of error between the two hemispheres, which adds to their use not being as sought after anymore...not to mention that you have to have a lot of sunlight, so summer is the most practical of times." Kurumi paused for a moment, cocking her head to the other side. "That being said, while they can still be used...other means have been created so that we do not NEED them to tell time and, as you said professor, have been degraded to being a garden decoration. Their complex science and calculations forgotten."

Because, honestly, if they were all outside of the classroom and asked if they thought using a sundial to help them tell the time was a good way to go about things, how many people would honestly say that they would choose that over a more convenient method?