calendar calendar

Name of the calendar used in naming a date such as a publication date, for example, “Gregorian”, “Japanese” (Emperor years), or “Thai Buddha”.
OPTIONAL on many elements; click for list and usage
Value Meaning
Text, numbers, or special characters Name of the calendar used in the date, for example, “Gregorian”, “Japanese”, or “Chinese”.
Restriction This is an optional attribute; there is no default.