Nathan Yau @flowingdata.com · Oct 31 This is a serious matter. 35 likes 1 replies ? Reply Replies Nathan Yau · Oct 31 Speaking of Halloween, one cannot forget the most iconic Halloween chart of all time, by Matthew Freeman (2006). I still don't know why the citation is from the Journal of Epidemiology and Community Health pmc.ncbi.nlm.nih.gov/articles/PMC...