google.com
"Sex" is a particularly interesting argument: http://www.google.com/trends?q=sex%2C+porn&ctab=0&geo=all&date=all&sort=0
Note Ramadan: http://www.google.com/trends?q=sex%2C+woman&ctab=0&geo=SA&geor=all&date=all&sort=0 (...and the correlation between Saudi news stories including "sex" and "woman")
Can't wait for the Trends API.
Holiday sex searches skyrocket, news stories plummet: http://www.google.com/trends?q=sex%2C+porn&ctab=0&ge...
Ramadan? http://www.google.com/trends?q=sex%2C+woman&ctab=0&g... (note the Saudi news correlation)
Edit: No coding over Christmas: http://www.google.com/trends?q=html%2C+php%2C+javascript%2C+...
If you just look at the turkey trend you can see the difference between Thanksgiving (in the US) and Christmas (in the UK)
http://google.com/trends?q=turkey&geo=usa&sa=N http://google.com/trends?q=turkey&geo=gbr&sa=N
But notice that Turkey is popular in the summer in the UK too. Could that be sun seeking holiday makers?
Another fun one is the Hajj (Muslim pilgrimage to Mecca)
http://google.com/trends?q=hajj&ctab=0&geo=all&d...
If you look carefully you can see the date slowly changing year on year because the Hajj is determined by a lunar calendar.