I'm confused by all this nuance about verb conjugations. The idea is to say "today I lived (but also am not alive anymore)" as I interpret it. Would it not suffice to say something along the lines of "by the end of today, I will have had lived". Of course, I know the response, this would not suffice, some sort of Anthony Bourdain-ish romanticism about a particular language and the romance of complicated French verb conjugations.