Hi Pádraig, > Off the top of your head might there be any platform general tests > that could be added to coreutils?
I'm not sure what you mean. I checked the conversions for consistency with what ICU does, and except for one difference [1] it seems to be consistent. But I don't think you would like to make use of ICU in the "make check" target of coreutils? Or do you mean, checking some calendar specific properties? Like that the year in the Ethiopian calendar is either 7 or 8 years behind the year in the Gregorian calendar? Bruno [1] https://unicode-org.atlassian.net/browse/ICU-23162
