Facebook: For the best click-through rate, bitly suggests posting to Facebook between 1 p.m. and 4 p.m. EST. Wednesday at 3 p.m. EST is the peak time of the week to post. Traffic from Facebook fades after 4 p.m. Weekend posts often get less attention than weekdays.
Twitter: Your best chance of getting high click counts on Twitter is with tweets sent in the afternoon earlier in the week -- namely 1 p.m. to 3 p.m. EST, Monday through Thursday. Bitly suggests users avoid posting after 8 p.m. or after 3 p.m. on Fridays. As with Facebook, weekend tweets are less effective than those sent during the week.
Tumblr: This social network has a "drastically different pattern of usage" than Facebook or Twitter, bitly says. Tumblr traffic from bitly links peaks between 7 p.m. and 10 p.m. EST on Monday and Tuesday, with similar traffic on Sunday. Friday evening -- a time that's generally ineffective for other networks -- can be an optimal time to post on Tumblr. On average, content posted after 7 p.m. receives more clicks over 24 hours than mid-day posts during the week.
Patti Wood, MA, Certified Speaking Professional - The Body Language Expert. For more body language insights go to her website at http://PattiWood.net. Also check out the body language quiz on her YouTube Channel at http://youtube.com/user/bodylanguageexpert.