“Why Daleks?” You’re probably thinking. Well, two reasons: one, Daleks are notorious for hatred, so I thought it’d be ironic to put them in the flags commonly associated with love. Two, I like the idea that these Daleks exterminate all homophobes. And with day 19, we have the Trigender Dalek.
It is defined as when someone's gender is two genders mixed into one, and made its first pride flag in 2014. And is 100% valid
More information here: Sadly, the site does not have this flag yet