The 2005 Year-End Zeitgeist shows "a few key events and phenoms to study, and predictably found the patterns to be amusing or bemusing, challenging or hearteningkind of like the year itself."
The other zeitgeist is a new feature in Google's Search History (which now appears to be rolled into Personalized Search): Trends. It "gives you a look at a list of your top searches and clicks and other info about your search activity."
It's quite interesting. It shows you're top searches, sites, and clicks. Then it breaks down your Google search activity into monthly and daily intervals. There it can show you your top queries, sites and hours when you search in any given month or day of the week.
Apparently I'm most likely to search for things on Thursdays. Also, 9pm is my most active searching hour. Most of my searching is between 7pm and midnight, and the second most active block is from 9am to noon.
Lastly, they have an intriguing feature at the end that tells me, "People with searches similar to yours also searched for:
george washington current events huffington post maths games wtop the meaning of christmas one solitary life austin news
1 Chronicles 12: "Now these were the numbers of the divisions that were equipped for war, and came to David at Hebron to turn over the kingdom of Saul to him, according to the word of the Lord: ... of the sons of Issachar who had understanding of the times, to know what Israel ought to do, their chiefs were two hundred; and all their brethren were at their command."