It would seem in answer to this question some would say yes there is! I’m guessing that you need to think internationally depending on your audience regarding when the best time to post is, or perhaps, you might even need to post different targeted content at several different points in the day (or night) to reach an international audience with content and information relevant to them. But this is perhaps all part of social media management.
I found one interesting infographic on the subject Courtesy of Social Caffeine (shown below) that gives one viewpoint in answering the question ‘Is there a best and worst time to post on social media?’. What do you think?