If the Earth were surrounded by the rings of Saturn, this is what it would look like.

If we were on Earth, looking up, it might look something like this:

 
If Earth had a ring like that, it would never really be night. The sun would always be hitting the ring somewhere, and it would reflect on the Earth. There would always be “ringlight.” Also, the sun would sometimes be behind the rings, making for interesting visual spectacles, which we can’t even imagine. The ring is so thin, the sun would really hardly be obstructed, but the ring surely would light up in a huge corona.