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ISO week date, the Glossary

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 (ISO) since 1988 (last revised in 2019) and, before that, it was defined in ISO (R) 2015 since 1971.^[1]

39 relations: Android (operating system), Broadcast calendar, Business, Calendar era, Calendar reform, Common year starting on Friday, Common year starting on Monday, Common year starting on Saturday, Common year starting on Sunday, Common year starting on Thursday, Common year starting on Tuesday, Common year starting on Wednesday, Coordinated Universal Time, Dominical letter, Doomsday rule, Equinox, February 29, Fiscal year, Government, Gregorian calendar, Hanke–Henry Permanent Calendar, International Organization for Standardization, ISO 8601, Leap week calendar, Leap year, Leap year starting on Friday, Leap year starting on Monday, Leap year starting on Saturday, Leap year starting on Sunday, Leap year starting on Thursday, Leap year starting on Tuesday, Leap year starting on Wednesday, Lexicographic order, Names of the days of the week, Ordinal date, Solstice, Symmetry454, Twitter, 4–4–5 calendar.
Calendaring standards
Leap week calendars
Weeks

Android (operating system)

Android is a mobile operating system based on a modified version of the Linux kernel and other open-source software, designed primarily for touchscreen mobile devices such as smartphones and tablets.

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Broadcast calendar

The broadcast calendar is a standardized calendar used primarily for the planning and purchase of radio and television programs and advertising. ISO week date and broadcast calendar are Specific calendars.

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Business

Business is the practice of making one's living or making money by producing or buying and selling products (such as goods and services).

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Calendar era

A calendar era is the period of time elapsed since one epoch of a calendar and, if it exists, before the next one.

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Calendar reform

Calendar reform or calendrical reform is any significant revision of a calendar system.

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Common year starting on Friday

A common year starting on Friday is any non-leap year (i.e. a year with 365 days) that begins on Friday, 1 January, and ends on Friday, 31 December.

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Common year starting on Monday

A common year starting on Monday is any non-leap year (i.e., a year with 365 days) that begins on Monday, 1 January, and ends on Monday, 31 December.

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Common year starting on Saturday

A common year starting on Saturday is any non-leap year (i.e. a year with 365 days) that begins on Saturday, 1 January, and ends on Saturday, 31 December.

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Common year starting on Sunday

A common year starting on Sunday is any non-leap year (i.e. a year with 365 days) that begins on Sunday, 1 January, and ends on Sunday, 31 December.

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Common year starting on Thursday

A common year starting on Thursday is any non-leap year (i.e. a year with 365 days) that begins on Thursday, 1 January, and ends on Thursday, 31 December.

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Common year starting on Tuesday

A common year starting on Tuesday is any non-leap year (i.e. a year with 365 days) that begins on Tuesday, 1 January, and ends on Tuesday, 31 December.

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Common year starting on Wednesday

A common year starting on Wednesday is any non-leap year (a year with 365 days) that begins on Wednesday, 1 January, and ends on Wednesday, 31 December.

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Coordinated Universal Time

Coordinated Universal Time (UTC) is the primary time standard globally used to regulate clocks and time.

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Dominical letter

Dominical letters or Sunday letters are a method used to determine the day of the week for particular dates.

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Doomsday rule

The Doomsday rule, Doomsday algorithm or Doomsday method is an algorithm of determination of the day of the week for a given date.

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Equinox

A solar equinox is a moment in time when the Sun crosses the Earth's equator, which is to say, appears directly above the equator, rather than north or south of the equator.

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February 29

February 29 is a leap day (or "leap year day")—an intercalary date added periodically to create leap years in the Julian and Gregorian calendars.

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Fiscal year

A fiscal year (also known as a financial year, or sometimes budget year) is used in government accounting, which varies between countries, and for budget purposes.

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Government

A government is the system or group of people governing an organized community, generally a state.

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Gregorian calendar

The Gregorian calendar is the calendar used in most parts of the world. ISO week date and Gregorian calendar are Specific calendars.

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Hanke–Henry Permanent Calendar

The Hanke–Henry Permanent Calendar (HHPC) is a proposal for calendar reform. ISO week date and Hanke–Henry Permanent Calendar are leap week calendars and Specific calendars.

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International Organization for Standardization

The International Organization for Standardization (ISO) is an independent, non-governmental, international standard development organization composed of representatives from the national standards organizations of member countries.

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ISO 8601

ISO 8601 is an international standard covering the worldwide exchange and communication of date and time-related data. ISO week date and ISO 8601 are Calendaring standards and Specific calendars.

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Leap week calendar

A leap week calendar is a calendar system with a whole number of weeks in a year, and with every year starting on the same weekday. ISO week date and leap week calendar are leap week calendars.

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Leap year

A leap year (also known as an intercalary year or bissextile year) is a calendar year that contains an additional day (or, in the case of a lunisolar calendar, a month) compared to a common year.

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Leap year starting on Friday

A leap year starting on Friday is any year with 366 days (i.e. it includes 29 February) that begins on Friday 1 January and ends on Saturday 31 December.

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Leap year starting on Monday

A leap year starting on Monday is any year with 366 days (i.e. it includes 29 February) that begins on Monday, 1 January, and ends on Tuesday, 31 December.

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Leap year starting on Saturday

A leap year starting on Saturday is any year with 366 days (i.e. it includes 29 February) that begins on Saturday, 1 January, and ends on Sunday, 31 December.

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Leap year starting on Sunday

A leap year starting on Sunday is any year with 366 days (i.e. it includes 29 February) that begins on Sunday, 1 January, and ends on Monday, 31 December.

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Leap year starting on Thursday

A leap year starting on Thursday is any year with 366 days (i.e. it includes 29 February) that begins on Thursday 1 January, and ends on Friday 31 December.

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Leap year starting on Tuesday

A leap year starting on Tuesday is any year with 366 days (i.e. it includes 29 February) that begins on Tuesday, 1 January, and ends on Wednesday, 31 December.

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Leap year starting on Wednesday

A leap year starting on Wednesday is any year with 366 days (i.e. it includes 29 February) that begins on Wednesday 1 January and ends on Thursday 31 December.

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Lexicographic order

In mathematics, the lexicographic or lexicographical order (also known as lexical order, or dictionary order) is a generalization of the alphabetical order of the dictionaries to sequences of ordered symbols or, more generally, of elements of a totally ordered set.

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Names of the days of the week

In many languages, the names given to the seven days of the week are derived from the names of the classical planets in Hellenistic astronomy, which were in turn named after contemporary deities, a system introduced by the Sumerians and later adopted by the Babylonians from whom the Roman Empire adopted the system during late antiquity.

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Ordinal date

An ordinal date is a calendar date typically consisting of a year and an ordinal number, ranging between 1 and 366 (starting on January 1), representing the multiples of a day, called day of the year or ordinal day number (also known as ordinal day or day number).

See ISO week date and Ordinal date

References

[1] https://en.wikipedia.org/wiki/ISO_week_date

Also known as ISO 8601 week, ISO 8601 week date, ISO 8601 week notation, ISO 8601 week number, ISO week, ISO week system, ISO week year, ISO year, Week date.

ISO week date, the Glossary

Table of Contents

See also

Calendaring standards

Leap week calendars

Weeks

References