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+...