At the risk of being obtuse : I think the etymology of "altruism" is telling. It comes from a word meaning "other" or "other people". Insofar as I want to make the future go as well as possible, I want to do it as expression of (an idealised) collective agency, not just as an individual helping those in need.
Sorry to be a nit pick, but what time on 1st September AoE? 00:00 or 23:59? "As generous as possible" would suggest 23:59, but granted it feels like that might be taking the piss a little.