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...

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.

When is the best time to post to Tumblr?

This data is from May 2012, but it’s a fair bet that it’s still accurate.

One of the questions on our Tumblr Survey asked people to identify when they were most likely to be active on Tumblr: 75% of respondents said they were likely to be on between 5pm and 10pm, and 51% said they were likely to be on Tumblr between 11pm and 2am.