Notes for JJ 3x01:
At 8 minutes in, there's a football game on TV at the bar, but it could be an old game.
At 22 minutes in, the Empire State Building seems to be lit magenta/pink (?) and green/blue (?), and at 38 minutes in, it's green.
At 27 minutes in, an email from SoHo Emporium says it's spring.
At 39 minutes in, Trish's show is advertising an "Easy Breezy Summer Tank", meaning it could be mid-late spring 2018. There are also pumpkin stickers in the background of the bar, but they can be ignored.
3x02:
At 5 minutes in, there are news articles about crime rates rising alongside summer temperatures, likely placing Trish's training in summer 2017, which fits with the ending of season 2.
At 12 minutes in, the store is called Halloween Adventure - New York Costumes, so it just seems to be a general-purpose costume shop.
At 19 minutes in, a police report shows the victim's age as 37, and his birth date as 10/06/1981, meaning this scene takes place after October 6, 2018. This might be contradictory to it seemingly being shortly after season 2 though.
At 34 minutes in, Grace says it's spring, so a year might have passed at this point, and it's late winter/early spring 2018.
At 47 minutes in, there's a wrestling match playing on TV.
3x03:
At 47 minutes in, Trish says she's spent the last year honing her skills.
3x05:
At 2 minutes in, same evidence as the trailer: the Account Summary sheet is for the period of April 24 to May 24, the Consumer Credit Report was issued 3/15/2016. and the LeesonBank sheet's statement period is August 24 to September 22.
At 48 minutes in, the Empire State Building seems to be lit gold.
3x06:
At 41 minutes in, Benowitz says that Rand is on sabbatical, so this is likely after Iron Fist season 2.
3x07:
At 10 minutes in, we see a news article dated April 7, 2001, which is said at 14 minutes in to be 18 years ago, implying this is in 2019 or late 2018.
3x08:
At 6 minutes in, Grace says Mother's Day is in 6 months, which may imply it's November, but since she and Trish were bantering, maybe it's just a few months until Mother's Day, and it's an exaggeration?
At 23 minutes in, Wallace mentions Jessica fighting a female serial killer last year, presumably Alisa in season 2.
3x10:
At 44 minutes in, the Empire State Building is green.
3x12:
At 39 minutes in, the Empire State Building is green.
3x13:
At 4 minutes in, Luke mentions the Raft.
At 8 minutes in, Trish mentions debuting their spring-summer collection.
At 11 minutes in, the Empire State Building is light-green.
At 12 minutes, an email from SoHaute SoHo mentions "Fall styles".
Will continue to update later.
