I have often wondered what might be the best time of day to post to LinkedIn, Twitter and Facebook? 

Posts mid-morning or mid-afternoon often go unnoticed, whilst those posted before 9am (such as this one - 08.30) seem to get better traction. 

Well, it seems I wasn't the only one.  

These chaps in the US have carried out some interesting research amongst professional services firms on best time of day, and best days of the week, to drive social media engagement. 

The results have one or two surprises, and some quite predictable - who would have thought that nobody reads social media posts on a Friday night!