You may be looking for The short story of the same name.

Icetime was one of two seasons, the other being Suntime, that ran on Ribos for approximately thirty-two Levithian years. This was due to Ribos having an extremely elliptical orbit around its sun.

The Ribosians believed that the season was caused by the Ice Gods, who they thought were fighting over Ribos with the Sun Gods. (TV: The Ribos Operation)

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