bn:03329473n
Noun Concept
Categories: Articles with short description, Weeks, All articles needing additional references, Leap week calendars, Calendaring standards
EN
ISO week date  NEN 2772  ISO 8601 week  ISO 8601 week date  ISO 8601 week notation
EN
The ISO week date system is effectively a leap week calendar system that is part of the ISO 8601 date and time standard issued by the International Organization for Standardization since 1988 and, before that, it was defined in ISO 2015 since 1971. Wikipedia
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EN
The ISO week date system is effectively a leap week calendar system that is part of the ISO 8601 date and time standard issued by the International Organization for Standardization since 1988 and, before that, it was defined in ISO 2015 since 1971. Wikipedia
Leap week calendar system in which weeks start on a Monday and the first week of a year starts from the Monday closest to 1 January; e.g. Thu. 31 Dec. 2009 is 2009–W53–4 Wikidata