Check out these valuable infographics by SumAll which illustrate the best times to post on various social media platforms, as well as when not to. Social media represented include Facebook, LinkedIn, Twitter, Instagram, Tumblr, Pinterest, and Google+.

Here is the full story:
http://www.coolinfographics.com/blog/2014/5/7/the-dead-zones-when-not-to-post-on-social-media.html