When are Facebook users the most active?

A couple of months ago, Mashable posted a very interesting study from Vitrue dealing with the behavior of Facebook users..

They found out interesting facts :

• The peaks of conversations take place on weekdays at 11am, 3pm and 8pm. Moreover, the largest one is at 3pm.
• People are less active on sundays.
• Promotional items posted in the morning are 39.7% more efficient.
• The beginning of each hour is more conducive to interaction (comments)

(You can visit Mashable.com to read the whole study.)

It reveals several clues about « How to maximize the visibility of my message on Facebook”.