there was some discussion about displaying a person’s life list in order by first observed date, and @kidlor modified one of his existing tools to do that, although i’m not sure if he has gotten around resolving a bug related to leaf taxa that have subspecies. (the way he did it, he would have to determine first observations based on taxon_id or ancestor taxon_id, rather than by just taxon_id.)
in that same thread, i described how you could create your own list using an alternative method.