Will it affect your blog if you post articles and date them 2-3 months ago? Say I made an article on November 11, 2010 but I edited the date to make it look like it was posted October 1, 2010. Follow up question, what if I schedule the posts? Like I made a November 11, 2010 post but scheduled it to go on live on November 30, 2010. What are the effects of changing the dates of your posts on Google search?