I believe that ISO8601 is as good a definition as we have for the datetime stamp, the Gregorian calendar, and the Proleptic Gregorian calendar.
ISO8601 is explicit in the inclusion of year `0000` and its interpretation. > years prior to 1583 are not automatically allowed by the standard. Instead > "values in the range [0000] through [1582] shall only be used by mutual > agreement of the partners in information interchange." CF is a good example of mutual agreement between partners. An expanded year representation [±YYYYY] is available, again by mutual agreement. and it must be prefixed with a + or − sign. By convention 1 BC is labelled +0000, 2 BC is labeled −0001. -- You are receiving this because you are subscribed to this thread. Reply to this email directly or view it on GitHub: https://github.com/cf-convention/cf-conventions/issues/298#issuecomment-717380103 This list forwards relevant notifications from Github. It is distinct from [email protected], although if you do nothing, a subscription to the UCAR list will result in a subscription to this list. To unsubscribe from this list only, send a message to [email protected].
