When did you start becoming nostalgic?

I started becoming nostalgic about three years ago (I was 13 at the time.)

I think it was because I found out about ZeldaFan20's "3 types of 2000's kids which one are you" thread on PerC and according to his ages 3-11 definition, I was a 2000's/2010's kid (leaning 2000's, childhood being 2005-2013.) I was amazed at the whole thing. At this point, I became really nostalgic for the 2000's.

Link to that thread: http://www.personalitycafe.com/generation-z-forum/451930-3-types-2000s-kids-one-you.html

In the late 2000s (late 2008). Considering how long I've been nostalgic, I'm surprised I didn't find this site sooner.

Since I started to hear less and less (new) rock music and since when guys started wearing their hair short. This was around the early to mid 2010s. Ever since then, I'm practically in a perpetual state of nostalgia, wishing the 2010s have turned out differently to how it has done so now.

I started becoming nostalgic many years ago.

My nostalgia peaked in 2015.

At 12, i started to miss years such as 2012-2014 but when i was 13 that was when i started to become nostalgic for those years and the early 2010s in general.
I also realized at age 12 how my life was good then before i went to middle school.