National Coming Out Day!

Tomorrow is national coming out day and I have been mulling something over for the past month or so: should I come out to my sister tomorrow? First off, she's lesbian and she came out to me back in February and she's really comfortable talking about it with me. Like how when we watched Oceans 8 she leaned over and said "I wish Anne Hathaway could be my wife"😂 And just this summer I finally came to terms with the fact that I'm bi so obvi I would aslo love for Anne Hathaway to be my wife😂 but most importantly I would just really love to let my sister in on this huge secret that I don't want to hide from her anymore. So she's away at college right now and we frequently send each other letters so I was wondering if the letter I send her today should by my coming out to her??