2012--that record low minimum year--saw about 400k of extent added in the week-and-a-half between today's date and that year's maximum. But that was highly unusual; the average over the past ten years has been for extent to increase just another 100k or so, and max out on March 7.
FWIW, 2017 is currently 179k km2 below 2015's record low maximum. Neither 2016, 2015, 2013, 2008, or 2007 saw large enough extent increases from this date to go over that record this year. But even should 2017 not set a new record, I'm still more impressed (depressed?) by the fact that both January and February have seen the lowest average extent for their respective months on record, as did November and December of 2016. That makes four consecutive months with the lowest average, a feat which hasn't happened since summer of 2012.