Ever had one of those days that feels like it took a year to pass? If we ever find life on Venus, don't mention it to one of the residents. They're unlikely to have a great deal of sympathy.
Despite being almost the same size as Earth, its closer orbit around the Sun, along with its curious rotation (it spins in the opposite direction to the Sun and most known planets) and the fact that it doesn't tilt on its axis, means the way that its days and nights work are completely different. For Venus to complete one rotation takes 243 days. By that time, it will have completed a full trip around the Sun, which takes it only 225 days. A whole year will have passed before the day is out.