IntegerToWeekNumber (Function)

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Functions for managing dates and times

Characteristics of the weeks

Constants for managing dates

DateTimeLocalToTimeZone

DateTimeLocalToUTC

DateTimeTimeZoneToLocal

Functions for managing dates and times

IntegerToDate

IntegerToDay

IntegerToDayInAlpha

IntegerToMonthInAlpha

Managing dates and times

Characteristics of the weeks
Special cases

WINDEV

WEBDEV

WINDEV Mobile

Others

See also

IntegerToWeekNumber (Function)

In french: EntierVersNuméroDeSemaine

Returns the week number in the year corresponding to the specified date (this date is an integer).

Versions 15 and later

This function is now available for the Android applications.

New in version 15

This function is now available for the Android applications.

Versions 16 and later

This function is now available for the Windows Phone applications.

New in version 16

This function is now available for the Windows Phone applications.

Versions 17 and later

This function is now available for the iPhone/iPad applications.

New in version 17

This function is now available for the 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.

Example

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

Syntax

<Result> = IntegerToWeekNumber(<Date>)

<Result>: Integer

Number of the week (between 0 and 53) corresponding to the specified date.

<Date>: Integer

Number of days passed since January 1st 1800 + 1 (can be obtained by DateToInteger).

Remarks

Characteristics of the weeks

A weeks 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. The 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 found between the Sunday of the 52nd week and January 1st are part of week 53.

Special cases

The week number cannot be retrieved for the dates earlier than October 14th 1582 (the change from the Julian calendar to the Gregorian calendar will not be taken into account).

Component : wd250std.dll