Twitter after lunch and Facebook all afternoon...
That's not entirely true, but it's fun to write. For most of us, just getting the message out is nothing short of a miracle, but there are better and worse times to post. Of course, the best approach is to observe your own target audience, but the Mediabistro sister publication Social Times is following the frenetic trendshifts. Social Times takes a light-hearted view of the business and has recently been added to my newsfeed.
B2B Marketing Insight Blog: Best Times of Day to Post Content on Social Media Profiles, 2012-Oct-9 by Andrew Bates
Recently Social Times shared Social Caffeine's infographic, "The Best and Worst Times to Post on Social Networks" with data from many sources including Mashable.