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# DAYS

Calculates the difference between two date values. The result returns the number of days between the two days.

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

### Syntax

DAYS(Date2; Date1)

Date1 is the start date, Date2 is the end date. If Date2 is an earlier date than Date1 the result is a negative 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 recognised 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 LibreOfficeDev - PreferencesTools - Options - LibreOfficeDev Calc - Formula, button Details... in section "Detailed Calculation Settings", Conversion from text to number list box.

### Examples

=DAYS(NOW();"2010-01-01")) returns the number of days from January 1, 2010 until today.

=DAYS("1990-10-10";"1980-10-10") returns 3652 days.

Related Topics

DAYS wiki page.

Date & Time Functions

DATE

DATEDIF

DATEVALUE

DAY

DAYS

DAYS360

DAYSINMONTH

DAYSINYEAR

EASTERSUNDAY

EDATE

EOMONTH

HOUR

ISLEAPYEAR

ISOWEEKNUM

MINUTE

MONTH

MONTHS

NETWORKDAYS

NETWORKDAYS.INTL

NOW

SECOND

TIME

TIMEVALUE

TODAY

WEEKDAY

WEEKNUM

WEEKNUM_EXCEL2003

WEEKNUM_OOO

WEEKS

WEEKSINYEAR

WORKDAY

WORKDAY.INTL

YEAR

YEARFRAC

YEARS