Congratulations, but don't they teach superstition in school anymore? Let people know on the 24th because there's a minimum of five people who can take shots at you and who knows which one or more of them might be having a bad day on the 23rd.
You'll know, but for those that don't, one strain of B. subtilis is marketed as Serenade, a biological fungicide. It's the final disease spray I use on my fruit trees in the spring and the idea is that it colonizes plants and prevents bad microbes from becoming established. It's a bacterial workhorse and exploited for all kinds of other things too, such as PhD research.
Good luck and what's the next step for you? I hope my daughter goes into microbiology or biochemsitry, but I know that if she realizes that, she'll decide to be a business major.