Earth.com has one interesting article about the temporary “disappearance” of Saturn's rings in about six months”:
In March 2025, Saturn's magnificent rings will become virtually invisible to Earth-based observers. This phenomenon occurs due to the unique tilt of Saturn's axis, which will place the rings at the edge of our field of view. 
Saturn's axial tilt, which is the angle its axis tilts compared to its orbit around the Sun, is about 27 degrees. As Saturn moves during its orbit around the Sun (lasting 29,5 years), this tilt causes different effects, as parts of the planet's rings and moons receive sunlight at different angles, changing the their appearance.
So the rings won't actually disappear, but they're playing hide and seek. When they reappear, we'll also be able to enjoy a better view of Saturn's moons.
Saturn's axis has a tilt, as does Earth's axis. Half the year, then, Saturn tilts toward the Sun, illuminating the top of its rings. For the other half, it tilts back and the Sun shines at Saturn's south pole and the lower part of the rings.
So the interesting thing is that there are two brief moments during Saturn's orbit when the edge of the rings point directly at the Sun. This event, also known as the equinox, causes the above phenomenon, if only for a while.
