Google Advanced Search takes a step forward and adds more date options.

Thats not all, Ionut also mentions that you can also define time-frames.

"The nice thing is that you can change the value of as_qdr to custom intervals. Here are all the possible values of the as_qdr parameter:

• d[number] - past number of days (e.g.: d10)
• w[number] - past number of weeks
• y[number] - past number of years

For example, http://www.google.com/search?q=china&as_qdr=d10 lets you search for pages that contain "China" and were created in the past 10 days."

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