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...

Geneva-based ISO standards organization uses Monday as the first day of the week in its ISO week date system through the international ISO 8601 standard...

ISO 8601 is an international standard covering the worldwide exchange and communication of date and time-related data. It is maintained by the International...

calendar. Some, however, such as the ISO week date calendar, are simply conveniences for specific purposes. The ISO calendar in question is a variation...

ISO 2015 is a standard of the International Organization for Standardization (ISO), superseded by ISO standard ISO 8601. The standard ISO week numbering...

12th month Academic term Calendar reform Common year Fiscal year ISO 8601 ISO week date Leap year Model year Tropical year Seasonal year "calendar year"...

or day number). The two parts of the date can be formatted as "YYYY-DDD" to comply with the ISO 8601 ordinal date format. The year may sometimes be omitted...

introduced by Muslim astronomers in the 8th century CE to predict the approximate date of the first crescent moon, which is used to determine the first day of each...

Monday could be observed to the previous Friday. Calendar reform ISO week date Leap week calendar Positivist calendar World Calendar See the table in Cotsworth...

radiocarbon dating, the reference date is January 1, 1950 (though the specific date January 1 is quite unnecessary, as radiocarbon dating has limited...