Det låter som "All Summer in a Day", av Ray Bradbury. Jag kommer ihåg att läsa den när jag var i grundskolan och blev upprörd på [strängen av expletives deleted] medlemmar i Margot's class.
Sammanfattning av Wikipedia-plot:
The story is about a class of school children on Venus, which in this story is a world of constant rainstorms, where the sun is only visible for two hours every seven years.
One of the children, Margot, moved to Venus from Earth five years earlier, and she is the only one in her class to remember sunshine, since the sun shone regularly on Earth. She describes the sun as "a penny", or "like a fire in the stove", and the other children, being too young ever to have seen it themselves, refuse to believe her account of it. She is bullied and ostracized by the other students and is locked in a closet.
As the sun is about to appear, their teacher arrives to take the class outside to enjoy their only two hours of sunshine and, in their astonishment and joy, they all forget about Margot. They run, play, skip, jump, and prance about, savoring every second of their newly found freedom. "It's much better than sun lamps!" one of them cries.
Suddenly, a girl catches a raindrop in her hands. Thunder sounds, and they run back inside. At this point one of them remembers Margot who is still locked in the closet. Ashamed, they let her out of the closet, standing frozen, embarrassed over what they have done, and unable to "meet each others glances."
The precious sun has come and gone and, because of their despicable act, Margot, who loved the sun the most has missed it.