Member Rara Avis
I'm guessing it wasn't even very close to midnight yet?
Venus is often called the evening star, as it is brighter than any other object in our sky save the sun and moon. However, its elongation (the angle between sun, Earth, and Venus) is only 47 degrees, so it can never be seen much later than three hours after sunset or three hours before sunrise. This time of year, in our hemisphere, Venus has usually set a good hour before midnight.
Someone recently told me you could tell a planet from a star because only the stars twinkled.
They believed the twinkle was from the fiery surface of the star, which would obviously be absent on a planet. In truth, the twinkle is from the light passing through our very dust-littered atmosphere, and is only less evident with a planet because of the magnitude of the light. A brighter light shines through the dust more clearly than a dimmer light.