If you're looking for better results from your social media strategy, finding the right time to post to your social networks is a huge step forward both in terms of maximizing your reach potential and growing your online audience.
Twitter and Facebook have a corresponding pattern of usage. If you want your tweets or posts to receive the maximum amount of impressions, it is recommended by almost every social media expert to publish them between 1 p.m. to 3 p.m. EST, Monday through Thursday. Tumblr, however, because of its significantly different age demographic, has a "drastically different pattern of usage", bitly says.
To maximize your impact, you should try your best to post mainly at night. The optimal time to post on Tumblr, according to bitly, is between the hours of 7 p.m. and 10 p.m. EST on Monday through Thursday, not including just about anytime on Sunday. According to click-thru research, it is strongly suggested you match your post schedule around that of a high school or college student’s schedule, as the 13-24 age demographic indubitably makes up the largest percentage of Tumblr users. Whereas Facebook is very fast paced in usage patterns, the majority of Tumblr users tend to visit the platform with the intention of staying awhile, easily making it one of the most engaging social sites in the world....
[Really valuable advice on timing posts for social media and what makes Tumblr unique ~ Jeff]
Via Jeff Domansky