Fair, very fair. Have gotten bit by that in the past. Adding an IANA library to the ISO8601 library (often part of the same lib) has so far solved that problem

Fair, very fair. Have gotten bit by that in the past. Adding an IANA library to the ISO8601 library (often part of the same lib) has so far solved that problem for me. I’m sure it starts struggling with dates before the early 1800’s though. Also doesn’t work well if you’re dealing with relativistic effects I think.