No, fo the same reasons sun dials still work: The sun rises at a slightly different point on the horizon. The trick even works north of the polar circle where t

No, fo the same reasons sun dials still work: The sun rises at a slightly different point on the horizon. The trick even works north of the polar circle where there may be 24h days, as the sun is always in another direction. The sun moves around, whether it is above or below the horizon, so the trick works regardless of length of time the sun happens to be above the horizon.