When did you know?

When I was twelve I got real depressed and started feeling dysphoria (despite puberty having started when I was eleven, I had (wrongly) assumed my body would grow to make exactly like I was before, only at twelve did it hit me I'd be stuck like this forever)
Started coming out at thirteen to my parents and friends.
As a kid I never really questioned my gender, I just assumed I'd inevitably grow up to have a mustache. I really liked dresses as a kid though, and all my friends are girls, so I didn't really show the 'signs'.

 

I'm 19, and I just recently started accepting myself as agender.

 

I've experienced various forms of gender dysphoria since childhood; I tried to express my feelings to my mother when I was twelve but that didn't go anywhere. This was before the internet so I had no idea if how I felt was even possible -- hell, I didn't even know the terms transgender, cisgender, etc. existed.

Fast-forward to my mid-20s. I knew enough about myself to ask my husband to never refer to me as a woman or girl (this was when we first started dating). Here I am in my 30s and I know without a doubt I fall under the trans* umbrella but am still trying to figure out where.

 

I knew I was different since I was around 4 years old; I was always very masculine, hated typical "girl's" activities, considered myself to be "one of the boys" and wore my step-brother's hand-me-downs when my Mom wasn't deciding my wardrobe. I used to daydream of introducing myself to a new class as a boy, and my usual excuse for the aforementioned behavior was "boys can do it; why can't I?". My mother was disconcerted and embarrassed by my odd personality, and tried to make me conform to feminine stereotypes. I never felt much dysphoria at that point, but it caught up to me hard at puberty. I lapsed into anxiety and self-loathing, and felt a deep sense of something being seriously wrong. I didn't learn about other gender identities until entering my high school's GSA, and I concluded that I was transgendered at the age of 17. I initially identified as genderqueer, but eventually settled on FtM.