Calendar box objects have the following properties: - the Gregorian year number. This is negative for BC years; for example, for the year 100 BC the value of calendarBox.year is . (BC years are calculated by "1 - n" rather than "0 - n", as there is no year zero.) - the Gregorian year text. This is a string value of the format "n" for AD years and "n BC" for BC years. - the text of the box caption (the bold text that appears directly above the box). The default caption is the value of . - the text of the box footnotes. - the page name used by the navbar.