June 21, 2016. Difficulty rose by +6.83% to 209.45B from 196.06B.
Change
+6.83%
New difficulty
209.45B
Period length
13.1 days
Network hashrate then (7-day)
1.5 EH/s
Bitcoin price then
$724
Hashprice then
$1,799/PH/day
The 2,016 blocks before it took 13.1 days instead of 14, so the network had more hashrate than the difficulty assumed, and difficulty rose by 6.83%: a large adjustment. For every machine on the network that is a pay cut of the same size until the next retarget.