unwrapping:

Prime Times on Tumblr: Post in the P.M. (in the U.S.)This graphic shows Tumblr’s peak activity, according to URL shortener Bit.ly. Rows represent days of the week. Columns show hours of the day, labeled for the Central time zone in North America. The darker the blue, the more Tumblr traffic during that hour. I’ve marked orange borders around the Tumblr prime times, showing higher activity during p.m. hours.

unwrapping:

Prime Times on Tumblr: Post in the P.M. (in the U.S.)
This graphic shows Tumblr’s peak activity, according to URL shortener Bit.ly. Rows represent days of the week. Columns show hours of the day, labeled for the Central time zone in North America. The darker the blue, the more Tumblr traffic during that hour. I’ve marked orange borders around the Tumblr prime times, showing higher activity during p.m. hours.