Seems Google is testing using time elements in their search results, according to results found by Cheezhead, though the first comment was from Danny Sullivan who thinks the results may be related to advanced search.
Time elements could be an interesting filter when dealing with news or blog sites, but beyond that it promotes constantly changing your content. I would like to hear from anyone else that has seen this or people with comments on its use.
This Year's Premier Digital Marketing Event is #CZLSF
ClickZ Live San Francisco (Aug 11-14) will bring together the industry's leading online marketing practitioners to deliver 4 days of educational sessions and training workshops. From Data-Driven Marketing to Social, Mobile, Display, Search and Email, the comprehensive agenda will help you maximize your marketing efforts and ROI. Register today!