IntegerToWeekNumber (Function)

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Date and time management functions

Date and Time management functions

Date management constants

DateTimeLocalToTimeZone

DateTimeLocalToUTC

DateTimeTimeZoneToLocal

IntegerToMonthInAlpha

Managing dates and times

Week characteristics
Special cases

WINDEV

WEBDEV

WINDEV Mobile

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See also

IntegerToWeekNumber (Function)

In french: EntierVersNuméroDeSemaine

Returns the week number within the year that corresponds to the specified date (this date is an integer).

Versions 15 and later

This function is now available for Android applications.

New in version 15

This function is now available for Android applications.

Versions 16 and later

This function is now available for Windows Phone applications.

New in version 16

This function is now available for Windows Phone applications.

Versions 17 and later

This function is now available for iPhone/iPad applications.

New in version 17

This function is now available for iPhone/iPad applications.

Versions 18 and later

This function is now available in Android widget mode.

This function is now available in Windows Store apps mode.

New in version 18

This function is now available in Android widget mode.

This function is now available in Windows Store apps mode.

This function is now available in Android widget mode.

This function is now available in Windows Store apps mode.

Versions 21 and later

This function is now available in Universal Windows 10 App mode.

New in version 21

This function is now available in Universal Windows 10 App mode.

Versions 26 and later

This function is now available for Apple Watch applications.

New in version 26

This function is now available for Apple Watch applications.

Example

IntegerToWeekNumber(DateToInteger("20011225")) // Returns 52

Syntax

<Result> = IntegerToWeekNumber(<Date>)

<Result>: Integer

Week number (between 0 and 53) that corresponds to the specified date.

<Date>: Integer

Number of days elapsed since January 1st 1800 + 1 (this number is returned by DateToInteger).

Remarks

Week characteristics

A week starts on a Monday and ends on a Sunday.

For the first days of the year:

If the first day of the year is a Friday, Saturday or Sunday, the week number will be 0. Week #1 will correspond to the first Monday of the year.
If the first day of the year is a Monday, Tuesday, Wednesday or Thursday, the week number will be 1.
The days between Sunday of the 52nd week and the 1st of January are in week 53.

Special cases

This function cannot be used to retrieve week numbers from dates before October 14, 1582 (the change from the Julian to the Gregorian calendar will not be taken into account).

Business / UI classification: Neutral code

Component: wd270std.dll