Contents

# Date & Time Functions

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

若要使用此指令...

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.

## 第零天的日期基準

會從第零天開始起算已過的天數。您可以設定第零天為下列其中一項：

日期基準 | 使用
--- | ---
'1899-12-30' | (預設值)
'1900-01-01' | (用於之前的 StarCalc 1.0)
'1904-01-01' | (用於 Apple 軟體)

選擇 [LibreOffice] - [喜好設定][工具] - [選項] - [LibreOffice Calc] - [計算] 以選取日期基準。

在不同的試算表之間複製與貼上包含日期值的儲存格時，這兩個試算表文件均必須設定為相同的日期基準。如果日期基準不同，將會變更顯示的日期值！

## 兩位數年份

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.

## 函式

Date & Time Functions

DATE

[text/scalc/01/func_datedif.xhp#datedif not found].

DATEVALUE

DAY

DAYS

DAYS360

DAYSINMONTH

DAYSINYEAR

EASTERSUNDAY

EDATE

EOMONTH

HOUR

ISLEAPYEAR

[text/scalc/01/func_isoweeknum.xhp#isoweeknum not found].

MINUTE

MONTH

MONTHS

NETWORKDAYS

NETWORKDAYS.INTL

NOW

SECOND

TIME

TIMEVALUE

TODAY

WEEKDAY

WEEKNUM

WEEKNUM_ADD

[text/scalc/01/func_weeknum_ooo.xhp#weeknum_ooo not found].

WEEKS

WEEKSINYEAR

WORKDAY

WORKDAY.INTL

YEAR

YEARFRAC

YEARS

相關主題

Functions by Category

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