The earliest rumbling were in 2011, it really started to gain steam in 2012, doubled down in 2014, continued to gain a lot of steam in 2015 and then finally solidified in 2016.
The first time I really noticed people using "it's current year!" was 2015 though.
There was a huge tonal shift in 2016 though, prior to 2016 SJWs were far more willing to work with you, talk with you, debate with you, sure they always treated you like an idiot, but there was an assumption that you just needed to hear the right thing to win you over, 2016 is when things changed, that was when they made it clear there was no longer any room for talk or debate, you were either with them or against them
I could have lived with 2015 levels I guess, but 2016 and beyond has been a nightmare.
Honestly, I think the roots go back further - "Current Year" is just an evolution of "Current Decade". Maybe it's my age, but I remember a ton of people saying "It's the 90s!" to justify all sorts of insane behaviour and views.
"It's current year!" is indeed the sequel to "It's the 90s!"
In many ways what's been going on is like an echo of 90s culture, which messes with my head as someone nostalgic for the 90s, however there's still a world of difference, the 90s was a lot more fair with things, modern culture is nothing but unfairness, modern culture is the 90s retarded child.
Modern SJWs would have been looked at as complete lunatics in the 90s.
A lot of this stuff is all older than your parents. This is simply the third attempt to destabilize and transform the West. And it won't stop; why would it? Every generation fights less and less while slowly adopting more and more decadence, degeneracy, hedonism, and decay as "common sense" middle ground.
The question I have though is, why now and why are they going so far with it? Do they honestly not expect a backlash?
The trouble I have with stuff like "it's a Jewish conspiracy!" is tell me what serious trouble Jews were facing circa the 2000s that would make all this extreme political rhetoric necessary? If anything they're endangering themselves, Jews were safer in this country before they started pushing Woke.
I know you don't specifically mention Jews, but it's been on my mind, however whether it's a Jewish conspiracy or a conspiracy in general the trouble I have is calling it a "conspiracy" assigns more rationality than this stuff seems to be operating in, because it seems like it's only going to make things worse for everyone in the long run, if there's some sort of end goal in mind I have no idea what that would be.