Assembly: NodaTime (in NodaTime.dll) Version: 18.104.22.168 (1.3.1)
Many developers will never need to touch this class, other than to potentially ask a calendar how many days are in a particular year/month and the like. Noda Time defaults to using the ISO-8601 calendar anywhere that a calendar system is required but hasn't been explicitly specified.
Although this class is currently sealed (as of Noda Time 1.2), in the future this decision may be reversed. In any case, there is no current intention for third-party developers to be able to implement their own calendar systems (for various reasons). If you require a calendar system which is not currently supported, please file a feature request and we'll see what we can do.
Supported in the PCL? Yes