March 31st is (International) Trans Day of Visibility.
Both are very important dates.
TDoR was founded in 1998 to remember the murder of Rita Hester (and the fact that we know about her death is due to the diligent work of her community, that is, Black trans women: discussion here), and thus memorialize trans people who have fallen victim to attacks and raise awareness of continuing violence.
TDoV was founded much later, in 2009, by Rachel Crandall as a celebration of trans people, specifically citing that the sole holiday for trans people at the time was TDoR, a more somber day.
Both serve to educate and raise awareness, but come from different historical contexts.
What I really love is how Tsuyu has surpassed the bnha fandom and like,, everyone knows and loves her. I have seen so many supportive posts that are like “I hope the frog girl from that one anime is having a good day” I really love that. It is so pure and good. Tsuyu truly deserves this.