Difference between revisions of "OOoES/Traduccion/Calc: Funciones Fecha Hora"
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|[[Documentation/How_Tos/Calc: EDATE function|'''EDATE''']] | |[[Documentation/How_Tos/Calc: EDATE function|'''EDATE''']] | ||
− | |devuelve una fecha un | + | |devuelve una fecha un número de meses de distancia. |
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|[[Documentation/How_Tos/Calc: YEARFRAC function|'''FRAC.AÑO''']] | |[[Documentation/How_Tos/Calc: YEARFRAC function|'''FRAC.AÑO''']] | ||
− | |evuelve el nú | + | |evuelve el número de años incluidos en una fracción entre dos fechas. |
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Revision as of 16:38, 28 April 2008
Contents
Lista de las funciones Fecha & Hora de Calc
HOY | devuelve la fecha de hoy. |
AHORA | devuelve la fecha y la hora actual. |
AÑO | devuelve el año de una fecha determinada. |
MES | devuelve el mes de una fecha determinada. |
DIA | devuelve el día de una fecha determinada. |
DIASEM | devuelve el día de la semana para una fecha determinada. |
HORA | devuelve la hora de un momento determinado. |
MINUTO | devuelve el minuto de un momento determinado. |
SEGUNDO | devuelve los segundos de un momento determinado. |
FECHA | devuelve la fecha, considerando el año, mes y ddía del mes. |
FECHANUMERO | returns a date-time serial number from a text date. |
HORA | devuelve el tiempo, de una hora determinada, los minutos y los segundos. |
HORANUMERO | devuelve un serial numérico de fecha-hora desde un tiempo en texto. |
FIN.MES | devuelve la fecha del último día del mes. |
EDATE | devuelve una fecha un número de meses de distancia. |
DIA.LAB | devuelve una fecha en un determinado número de días de trabajo de distancia. |
DIAS.LAB | devuelve el número de días de trabajo entre dos fechas. |
DIAS | devuelve el número de días entre dos fechas. |
DIAS360 | devuelve el número de días entre dos fechas, utilizando un año de 360 días. |
DIASENMES | devuelve el número de días del mes de la fecha determinada. |
DIASENAÑO | devuelve el número de días del año de la fecha determinada.. |
SEMANAS | devuelve el número de semanas entre dos fechas. |
SEMANASENAÑO | devuelve el número de semanas en el año de la fecha determinada. |
SEMANANUMERO | devuelve el número ISO de la semana de una fecha determinada. |
WEEKNUM_ADD | rdevuelve el número no-ISO de la semana de una fecha determinada. |
MESES | devuelve el número de meses entre dos fechas. |
AÑOS | devuelve el número de años entre dos fechas. |
ESAÑOBISIESTO | pruebas si una fecha están en un año bisiesto. |
DOMINGOPASCUA | devuelve la fecha del Domingo de Pascua en un año determinado. |
FRAC.AÑO | evuelve el número de años incluidos en una fracción entre dos fechas. |
Información General Fecha y Hora
In Calc, dates and times are represented by numbers. For example the number 39441 may represent the date 25Dec07. We may enter 39441 in a cell, and then (selecting Format - Cells...) choose a date format to display the number as a date.
Although a number representing a date / time is the same as any other number (except that we choose to display it as a date or time) it may be helpful to use the term 'date-time serial number'. The date-time serial number is simply the number of days that have passed since a set starting date. The default (normal) starting date is 30 December 1899; choose Tools - Options - OpenOffice.org Calc - Calculate to change this to 1 January 1904 for Apple software, or 1 January 1900 for old StarCalc 1.0 software if necessary.
Times are represented as a fraction of a day - for example 0.5 is half a day, or 12 hours, or 12 noon; 0.25 is a quarter of a day, or 6 am. Thus 39441.25 represents 6am on 25Dec07.
It would be extremely inconvenient if, in order to enter a date in a cell, we had to work out the date-time serial number, enter it and then change the display format. Therefore Calc tries to do this for us: if we enter 25Dec07, Calc recognises that this is a date, converts it to the date-time serial number, and sets the format to display as a date. Calc recognises a wide range of possible date entries - for example 25-Dec-07, 25 December 2007, Dec 25 07, and 25/12/07 or 12/25/07 (these last two depend on the date system you use - whether days or months are written first).
If we only enter 2 digits of the year (for example 07 instead of 2007) Calc needs to know whether we mean 2007 or 1907. In Tools - Options - OpenOffice.org - General you may set the range of years for which Calc will recognise years given 2 digits.
Some of Calc's date and time functions return a 'date' or a 'time' ( for example TODAY() ). This is simply the date-time serial number, but if the cell is unformatted, Calc will display the date or time rather than a number format.
The descriptions of the Calc functions use the international standard ISO date format for clarity, because this does not depend on locale; for example, 23rd May 2009 is shown as 2009-05-23.
Tips y Trucos
All major spreadsheets (including Calc) handle dates and times in a similar way, for historical reasons, but this can be a bit cumbersome. Here are some helpful examples:
The date two weeks from now
- TODAY()+14. Simply add 14 days, and format the cell as a date to display it correctly.
How many days between two dates
- DAYS("23Jan08"; "9Jan08") returns 14, the number of days - however you can simply subtract one date from the other; for example if cell A1 contains 23Jan08 and cell A2 contains 9Jan08, A1-A2 also returns 14.
- Use NETWORKDAYS if you wish to know how many working days; for example NETWORKDAYS(A2; A1) returns 11, the number of whole workdays (including both end days but excluding weekends). NETWORKDAYS can also take account of other non-working days.
A column with dates a week apart
- Format the column to display dates as you prefer. Enter the first date at the top of the column (let's say that is cell A2). Enter =A2+7 in cell A3. Copy A3, and paste down the rest of the column.
A column showing the 15th day of consecutive months
- Format the column to display dates as you prefer. Enter the first date at the top of the column (say cell A2). In cell A3 enter =EDATE(A2; 1). Copy A3, and paste down the rest of the column.
A column showing the 15th day of months, quarterly (eg 15Jan, 15Apr, 15Jul, 15Oct)
- Format the column to display dates as you prefer. Enter the first date at the top of the column (say cell A2). In cell A3 enter =EDATE(A2; 3). Copy A3, and paste down the rest of the column.
A column showing the last day of consecutive months
- Format the column to display dates as you prefer. Enter the first date at the top of the column (say cell A2). In cell A3 enter =EOMONTH(A2; 1). Copy A3, and paste down the rest of the column.
The last working day of the month
- WORKDAY(EOMONTH(A1;0)+1;-1) finds the date of last weekday (Monday-Friday), where cell A1 contains the month or a date in that month. See WORKDAY() for how to cater for holidays and other non-working days.
Summing hours and minutes (more than 24 hours)
- Select the cells to sum; from the menu: Format - Cells...; Category = User-defined; Format code = [HH]:MM. You can now enter hours and minutes, for example 15:15, 25:30. Summing them gives 40:45, displayed correctly.
Summing minutes and seconds (more than 60 minutes)
- Use the example for hours and minutes above, but pretend that you are entering minutes and seconds, rather than hours and minutes. So entering 15:15 means 15 minutes 15 seconds.