First, the sun rises in the west on Venus, not the east.
Venus rotates slower than any other planet in our solar system… 243 days. That is actually longer than it takes for Venus to revolve around the sun (the Venus year is 225 days). The net result is a solar day that lasts about 116.75 Earth days.
Fortunately for the gameplay we aren’t tethered to the surface and we are suspended in a medium that is moving, on average, 200 km/h. That cuts the day down to about 192 hours or almost exactly 8 Earth days.
So that means that the “magic hour” lasts about 8 hours but then we are in complete darkness for almost 4 days!