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## WEEKNUM_ADD

The result indicates the number of the calendar week for a Date.

The WEEKNUM_EXCEL2003 function is designed to calculate week numbers exactly as Microsoft Excel 2003 did. Use the WEEKNUM function for ODF OpenFormula and Excel 2010 compatibility, or ISOWEEKNUM function when you just need ISO 8601 week numbers. In releases prior to LibreOffice 5.1 WEEKNUM_EXCEL2003 was named WEEKNUM_ADD.

#### Syntax

WEEKNUM_EXCEL2003(Date; ReturnType)

Date: the date within the calendar week.

Return type: 1 for week beginning on a Sunday, 2 for week beginning on a Monday.

#### Example

In which week number does 12.24.2001 fall?

=WEEKNUM_EXCEL2003(DATE(2001;12;24);1) returns 52.

Поврзани теми

Date & Time Functions

DATE

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

DATEVALUE

DAY

DAYS

DAYS360

EASTERSUNDAY

EDATE

EOMONTH

HOUR

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

MINUTE

MONTH

NETWORKDAYS

NETWORKDAYS.INTL

NOW

SECOND

TIME

TIMEVALUE

TODAY

WEEKDAY

WEEKNUM

WEEKNUM_ADD

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

WORKDAY

WORKDAY.INTL

YEAR

YEARFRAC