D'Amato - I have not personally recognized any trends within these social media sites at Adelphi University. I have heard that from some professionals (in recreation and the marketing field) that posting in the evenings/weekends can help you reach a larger audience at the moment you create your post. Here is an article I have used before as a guideline to these practices.

http://www.quicksprout.com/2015/01/02/what-are-the-best-times-to-post-on-social-media/