So, I need a planet which:
- Can support life and has attributes as close to Earth as possible
- Has a planetary ring
- That planetary ring is observable from specific place on such planet for most of the time,
However, in rare occasions, such planetary ring "disappears" from being observable from such place for at least one week (seven rotations of such planet around its axis)
Such rare occasions should repeat in once about 100 - 200 years ( = revolutions of planet around its star)
Knowing how planets work, it is totally ok if such ring is observable from other places on such planet without any eclipses.
All I need is a place of size of about United kingdom ( = 243 610 km² of area from which is this phenomena observable)