ISOWEEKNUM calculates the week number of the year for the internal date value.

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Rahvusvahelise standardi ISO 8601 kohaselt on nĂ€dala esimene pĂ€ev esmaspĂ€ev. NĂ€dal, mille pĂ€evadest osa jÀÀb ĂŒhte aastasse ja osa teise, kannab selle aasta nĂ€dalate numbrit, kuhu jÀÀb rohkem pĂ€evi. See tĂ€hendab, et aasta esimene nĂ€dal on see nĂ€dal, mis sisaldab kuupĂ€eva 4. jaanuar.


See funktsioon on saadaval alates LibreOffice'i versioonist 5.1



Arv on kuupÀeva seerianumber.


When entering dates as part of formulas, slashes or dashes used as date separators are interpreted as arithmetic operators. Therefore, dates entered in this format are not recognized as dates and result in erroneous calculations. To keep dates from being interpreted as parts of formulas use the DATE function, for example, DATE(1954;7;20), or place the date in quotation marks and use the ISO 8601 notation, for example, "1954-07-20". Avoid using locale dependent date formats such as "07/20/54", the calculation may produce errors if the document is loaded under different locale settings.


Unambiguous conversion is possible for ISO 8601 dates and times in their extended formats with separators. If a #VALUE! error occurs, then unselect Generate #VALUE! error in - LibreOffice Calc - Formula, button Details... in section "Detailed Calculation Settings", Conversion from text to number list box.


=ISOWEEKNUM(DATE(1995;1;1)) returns 52. Week 1 starts on Monday, 1995-01-02.

=ISOWEEKNUM(DATE(1999;1;1)) returns 53. Week 1 starts on Monday, 1999-01-04.

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