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# 日期和时间函数

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

要访问此命令...

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, 01/01/2000 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.

## 日期零的日期基准

日期是作为起始日期零的偏移进行计算的。可以将日期零设置为以下内容之一：

日期基准 | 使用
'12/30/1899' | （默认）
'01/01/1900' | （在以前的 StarCalc 1.0 中使用）
'01/01/1904' | （在 Apple 软件中使用）

选择 LibreOffice - 首选项工具 - 选项
- LibreOffice Calc - 计算 来选择日期基准。

在不同的电子表格之间复制和粘贴包含日期值的单元格时，必须将两个电子表格文档设置为相同的日期基准。如果日期基准不同，显示的日期值将发生变化！

## 两位数字年份

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.

## 函数

WORKDAY

YEARFRAC

DATE

DATEDIF

DATEVALUE

EDATE

TODAY

YEAR

NOW

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WEEKNUM

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

WEEKNUM_ADD

MINUTE

MONTH

EOMONTH

NETWORKDAYS

NETWORKDAYS.INTL

WORKDAY.INTL

EASTERSUNDAY

SECOND

HOUR

DAY

DAYS

DAYS360

WEEKDAY

TIME

TIMEVALUE

相关主题

函数清单（根据类别）