April 5, 2015. Difficulty rose by +5.84% to 49.45B from 46.72B.
Change
+5.84%
New difficulty
49.45B
Period length
13.2 days
Network hashrate then (7-day)
0.3 EH/s
Bitcoin price then
$254
Hashprice then
$2,620/PH/day
The 2,016 blocks before it took 13.2 days instead of 14, so the network had more hashrate than the difficulty assumed, and difficulty rose by 5.84%: a large adjustment. For every machine on the network that is a pay cut of the same size until the next retarget.