The Tranist of Venus across the face of the Sun was scheduled to be visible on 8th June 2004 at Aberdeen from about 0640 hrs to midday, weather permitting. Across the world, it was the first time anyone alive could have seen this phenomenon.
Those who didn''t get to my lecture on the topic can see the PowerPoint slides (in pdf) and read the text (.doc)
VT-2004 was an international observing programme seeking active participation of amateurs from around the globe.
You can see what happened here in Aberdeen on 8th June 2004.
The last chance to see the Transit of Venus for anyone alive today occured in June 6th 2012. A variant, slightly less technical, lecture on this transit was given in the Maritime Museum at Aberdeen and is reproduced with illustrations here in pdf form.
John S. Reid