You may not have to. https://en.wikipedia.org/wiki/Terraforming_of_Venus#Arguments_for_keeping_the_current_day-night_cycle_unchanged https://en.wikipedia.org/wi

You may not have to. https://en.wikipedia.org/wiki/Terraforming_of_Venus#Arguments_for_keeping_the_current_day-night_cycle_unchanged https://en.wikipedia.org/wiki/Terraforming_of_Venus#Argument...: “It has until recently been assumed that the rotation rate or day-night cycle of Venus would have to be increased for successful terraformation to be achieved. More recent research has shown, however, that the current slow rotation rate of Venus is not at all detrimental to the planet's capability to support an Earth-like climate. Rather, the slow rotation rate would, given an Earth-like atmosphere, enable the formation of thick cloud layers on the side of the planet facing the sun. This in turn would raise planetary albedo and act to cool the global temperature to Earth-like levels, despite the greater proximity to the Sun.”