I thought strings with ISO8601-encoded dates was the de-facto norm (i.e. "20161026T2044+0200 for this comment's timestamp). Have I been living in a bubble with

I thought strings with ISO8601-encoded dates was the de-facto norm (i.e. "20161026T2044+0200 for this comment's timestamp). Have I been living in a bubble with the majority being less sane?