Since 5 months of its last update, Google was not seen updating any
PageRank. The last update was done on 4th February 2013. There is no any
official state for its next PageRank update. Google usually takes 3
months to update PageRank from its last update.
The common question arising among the webmaster and blogger is "when
will be the next pagerank update?" Though there is no any official
update, people are expecting to have the update in the 2nd week of
August 2013. If we check the last year results of PageRank update, there was
an update in August 2011. So we can guess there may be an update this
month (August) too, but not sure.
There were some major Google algorithm changes were noticed during
the past two months. Google Panda updates are now completely merged in
Google algorithms and Google Penguin 2.0. So this might be the reason
for delaying.
