Anyone know what this movie is?

Based on a short story by a supposedly well known science fiction writer (at least according to my teacher at the time.)

It’s about a little girl and her schoolmates who live on a planet that only gets sunlight once every hundred years or something ridiculously long like that. The little girl is originally from Earth and tells all of her classmates about the sun, the flowers, the moon and the birds and all the things one would normally find outside. None of them believe her and ridicule her constantly. They all grew up on this planet underground or in some sort of compound and they get their light from artificial lamps they have to stand next to for like ten minutes a day. Anyway, the little girl has a stash of things from home, some pressed flowers, pictures, etc. The kids find her hiding place I think and I think they destroy her keepsakes.

Anyway, she goes around telling everyone the sun is coming and they don’t believe her, so they shove her in a closet and lock her in to punish her for being ridiculous. Then the sun comes out for that one hour every hundred years and they all run out and play and frolic and forget how they locked her in. They remember her once the sun sets and let her out, all very ashamed of themselves.

Any ideas? I saw this in my English class in the 7th grade and my teacher form back then won’t respond to my god damn email. Jerk.