Contents

# Hàm DAY

Trả về ngày của giá trị ngày tháng đã cho. Ngày được trả về dưới dạng một số nguyên nằm giữa 1 và 31. Bạn cũng có thể nhập một giá trị ngày/giờ âm.

This function is part of the Open Document Format for Office Applications (OpenDocument) standard Version 1.2. (ISO/IEC 26300:2-2015)

### Cú pháp

DAY(Số)

Number is the internal date number.

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.

### Ví dụ

=DAY(1) returns 31 (since LibreOffice starts counting at zero from December 30, 1899)

=DAY(NOW()) returns the current day.

=DAY(C4) returns 5 if you enter 1901-08-05 in cell C4 (the date value might get formatted differently after you press Enter).

Chủ đề Liên quan

DAY wiki page.

Date & Time Functions

Hàm DATE

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

Hàm DATEVALUE

Hàm DAY

Hàm DAYS

Hàm DAYS360

DAYSINMONTH

DAYSINYEAR

Hàm EASTERSUNDAY

Hàm EDATE

Hàm EOMONTH

Hàm HOUR

ISLEAPYEAR

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

Hàm MINUTE

Hàm MONTH

MONTHS

NETWORKDAYS

NETWORKDAYS.INTL

Hàm NOW

Hàm SECOND

Hàm TIME

Hàm TIMEVALUE

Hàm TODAY

WEEKDAY

Hàm WEEKNUM

Hàm WEEKNUM_ADD

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

WEEKS

WEEKSINYEAR

Hàm WORKDAY

WORKDAY.INTL

Hàm YEAR

Hàm YEARFRAC

YEARS