Other forms: idylls
An idyll is a short period in which everything is wonderful. You could say a cruise you took with your family was an idyll in an otherwise difficult year.
In its more formal sense, idyll describes a pastoral interlude or a poem set in nature — an idealized, or idyllic, version of nature where you are drinking champagne under the apple trees, and no one has stepped in cow manure or walked through poison ivy.