The resolution in Ray Bradbury's short story "All Summer in a Day" comes with the final sentence:
They unlocked the door, even more slowly, and let Margot out.
The story is tightly plotted, with a series of climactic moments arranged with neat symmetry, as follows:
1. The children lock Margot in the closet.
2. The rains stops for the first time in seven years, and the sun comes out.
3. The rain starts again, and the children are driven indoors.
4. One of the children suddenly remembers Margot, who is still locked in the closet.
The entire time described in the title, therefore, passes with Margot locked in the closet, unable to see the sun. The silence behind the door at the end leads the reader to wonder what has happened to Margot, but the fact that the other children are able to let her out suggests that she is physically unscathed. Although this provides the technical resolution to the story, the problems of the children's cruelty and Margot's missed experience are left unresolved.
The story does, however, give a hint of a more permanent resolution in the future. There is a further symmetrical structure beyond the timeline of the story, in which Margot came from Earth, where she experienced summer, and may go back there again soon. If she does so, she will experience months of summer every year, and the two missed hours of summer on Venus will be of little importance, except for the puerile unkindness they represent.