There is a lot of question of what time or what day(s) are the best to post a new blog post. Much of it comes down to which metric you are measuring. For example: Are you looking for the most ReTweets? The most Facebook Shares? The most clicks? The most time spent on the site?
Of course most people answer: “ALL OF THEM… YES… I WANT ALL OF THOSE.” The challenge is that much of those metrics have their peaks at vastly different times and days. The best method to start with is to explore the data from other sites (in general or in your niche) and use that data to help you start your own process of timing posts. Once you begin to experiment with post timing in conjunction with using a URL shortener that incorporates some analytic which allow you to track clicks, ReTweets, or other traffic (such as su.pr… which I use) you can begin to develop your own data set which reflects your own blog audience. Developing that skill of testing, assesing, and adjusting your post times to increase audience engagement will put your blog on a faster track to building your readership.
In the meantime here are some references for you to start with.
Here is a great graphic to help you start your exploration:
For more detailed information and a lot more research into data sets and choosing days/times based on specific metrics I encourage you to check out the blog of Social Media Scientist Dan Zarrella. There is a wealth of information there that will help answer a lot of questions about Timing of Blog posts, Tweets, and Facebook Likes.