What date format does the Standard mandate?
There are three basic formats: Calendar date, ordinal date, and week date. A calendar date should be written as a 4-digit year number, followed by a 2-digit month number, followed by a 2-digit day number. Thus, for example, 2 August 1953 may be written: 19530802 or 1953-08-02 An ordinal date should be written as a 4-digit year number, followed by a 3-digit number indicating the number of the day within the year. Thus, for example, 2 August 1953 may be written: 1953214 or 1953-214 2 August is the 214th day of a non-leap year. A week date should be written as a 4-digit year number, followed by a W, followed by a 2-digit week number followed by a 1-digit week day number (1=Monday, 2=Tuesday, …, 7=Sunday). The week number is defined in section 7.7. Thus, for example, 2 August 1953 may be written: 1953W317 or 1953-W31-7 2 August was the Sunday of week 31 of 1953. In all the examples above, the hyphens are optional. Note that you must always write all the digits. Thus the year 47 must be w
