|ISO 8601 Week Date format
|convert to ISO 8601 Week Date format. First element of result is year, second week number (1-53), third day of week (1 for Monday to 7 for Sunday).
Note that "Week" years are not quite the same as Gregorian years, as the first day of the year is always a Monday.
The first week of a year is the first week to contain at least four days in the corresponding Gregorian year.
|convert from ISO 8601 Week Date format. First argument is year, second week number (1-52 or 53), third day of week (1 for Monday to 7 for Sunday).
Invalid week and day values will be clipped to the correct range.
|show in ISO 8601 Week Date format as yyyy-Www-dd (e.g. "2006-W46-3").
|Produced by Haddock version 0.8|