There's a few of us on the wiki who are just now seeing that late 2014 works better for Season 1. There's the Incident being two years ago and the weather going from temperate to snowy as mentioned, but we noticed that the WHiH post actually favors late 2014 instead of early 2015.
In this quote from Charlie Cox, although he says six months pass between seasons, he states that the crime rate in New York plummeted as a result of a Fisk being imprisoned and criminals being afraid of Daredevil following the Season 1 finale, which aligns perfectly with the content of the WHiH post, meaning that the finale has to be before January 23, 2015. For a while it seemed like the season kinda had to be to early 2015 due to dialogue in Season 3 stating that Fisk was "wrongfully convicted two years ago" and that Marianna was protected for "two years," but at the very end of the Season 1 finale, Nelson states, "Fisk still needs to go to trial. Just getting a court date on a case this big could take a year," meaning he easily could've been imprisoned in late 2014 and convicted sometime in 2015. Some minor things, but the season also works better if it's closer to the flashbacks of them quitting Landman and Zack in July 2014, and what seems to potentially be a Christmas tree appears in the background during the semifinal scene of the Season 1 finale, though it's blurry so it's kind of hard to tell. We're thinking around November-December 2014 in order for the season to be after all of
I Am Groot and for Fisk saying in Season 2 in November 2015 that he met Murdock "several months ago" to still kind of work (11 months ago). We haven't formally proposed these changes yet but we're hoping this is enough to forgo crew statements (Cox and Woll saying around six months pass between seasons, which cannot be the case).