Merry Xmas, for infinitely large values of X

All right-thinking people will be celebrating Newtonmas next Thursday. Some purists will insist on sticking with their rival holiday, claiming it has priority, but their idol wasn’t even really born on December 25th! While many of our customs and notations were inspired by their guy, who in some circles is elevated to near-Godhood, it’ll be a hot day in Hell before I recognise Leibnizmas.