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# Date & Time Functions

These spreadsheet functions are used for inserting and editing dates and times.

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Insert - Function - Category Date & Time

The functions whose names end with _ADD or _EXCEL2003 return the same results as the corresponding Microsoft Excel 2003 functions without the suffix. Use the functions without suffix to get results based on international standards.

LibreOffice internally handles a date/time value as a numerical value. If you assign the numbering format "Number" to a date or time value, it is converted to a number. For example, 2000-01-01 12:00 PM, converts to 36526.5. The value preceding the decimal point corresponds to the date; the value following the decimal point corresponds to the time. If you do not want to see this type of numerical date or time representation, change the number format (date or time) accordingly. To do this, select the cell containing the date or time value, call its context menu and select Format Cells. The Numbers tab page contains the functions for defining the number format.

## Configuración de fecha pal día cero

Les feches calcular según la diferencia respecto al día cero. Pue establecer unu de los siguientes díes como día cero:

Configuración de fecha | Usar
--- | ---
'1899-12-30' | (predeterminada)
'1900-01-01' | (utilizada na antigua versión StarCalc 1.0)
'1904-01-01' | (utilizáu en software Apple)

Pue escoyese LibreOffice - Preferencies Ferramientes - Opciones - LibreOffice Calc - Calcular pa escoyer la base de les feches.

Cuando copia y pega caxelles que contienen valores de fecha ente distintes fueyes de cálculu, dambos documentos de fueyes de cálculu tienen de tener la mesma configuración pa les feches. Si la configuración de fecha ye distinta, van camudar los valores de fecha.

## Años de dos díxitos

In LibreOffice - Preferences Tools - Options - LibreOffice - General you find the area Year (two digits). This sets the period for which two-digit information applies. Note that changes made here have an effect on some of the following functions.

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 - Preferences Tools - Options - LibreOffice Calc - Formula, button Details... in section "Detailed Calculation Settings", Conversion from text to number list box.

Time zone information is not used in Date and Time functions and cells.

## Funciones

Date & Time Functions

FECHA

DATEDIF

FECHANÚMERO

DÍA

DÍES

DÍES360

DAYSINMONTH

DÍESNELAÑU

DOMINGOPASCUA

FECHA.MES

FIN.MES

HORA

ISLEAPYEAR

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MINUTU

MES

MONTHS

NETWORKDAYS

NETWORKDAYS.INTL

AGORA

SEGUNDU

HORA

HORANÚMERO

GÜEI

WEEKDAY

NÚM.SELMANA

NÚM.SELMANA_ADD

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WEEKS

WEEKSINYEAR

DIA.LAB

WORKDAY.INTL

AÑU

FRAC.AÑU

YEARS

Temes rellacionaos

Functions by Category