Atomic - 5:42 am on Feb 12, 2007 (gmt 0)
For the last few weeks it's seemed like there's a weekend set of SERPs that get replaced by the weekday SERPs. And even during the week there are the morning, evening and night-time SERPs. But I've seen most of the changes occur Friday night and Sunday night. Sunday night they go back to what they were Friday. Friday they revert to last weekend's exciting selection. I'm going to be on the lookout Friday. You can almost set your watch to it.