Unlike eclipses, Venus transits are truly rare. They come in pairs, separated by more than 100 years. The last one occurred in 2004 and next pair in 2117 and 2125.
Since this celestial event will not occur for over another 100+ years, I really wanted to witness it transpire before my very eyes. Then when I came home (the second time), the cloud overhead had cleared so that John and I could walk down the golf course behind where we live and watch the sun set with Venus in the foreground.