Weekday and Weekend SERP

I have been watching SERP during the weekdays and weekends and have noticed that some pages that don't show up during the week show up on the weekend results especially with google. Has anyone else noticed. Any thoughts as to why?

 

is it true?
I watch this week

 

This is new

I think i will check this out this weekend..

 

Your probabley hitting different Data Centers each time you check. Use this tool to see where you rank on a global level http://www.seocritique.com/datacentertool/

 

What I discovered though is that pages that are consistently showing up Monday-Friday, totally disappear on the weekend and vice-versa for those that don't show up during the weekdays show up on the weekends.

 

Can you show us with links ? or the page in question ?

 

I know that my traffic dips every weekend, but I just figured that people surf at work rather than at home.

 

i noticed it also that keywords are f lactating i think the reason is that google updates is fast approaching.

 

Which update ? Algo, PR or both ?