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  • Week characteristics
  • Special cases
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Stored procedures
Returns the week number within the year that corresponds to the specified date (this date is an integer).
Versions 15 and later
Android This function is now available for Android applications.
New in version 15
Android This function is now available for Android applications.
Android This function is now available for Android applications.
Versions 16 and later
Universal Windows 10 App This function is now available for Windows Phone applications.
New in version 16
Universal Windows 10 App This function is now available for Windows Phone applications.
Universal Windows 10 App This function is now available for Windows Phone applications.
Versions 17 and later
iPhone/iPad This function is now available for iPhone/iPad applications.
New in version 17
iPhone/iPad This function is now available for iPhone/iPad applications.
iPhone/iPad This function is now available for iPhone/iPad applications.
Versions 18 and later
Android Widget This function is now available in Android Widget mode.
Universal Windows 10 App This function is now available in Windows Store apps mode.
New in version 18
Android Widget This function is now available in Android Widget mode.
Universal Windows 10 App This function is now available in Windows Store apps mode.
Android Widget This function is now available in Android Widget mode.
Universal Windows 10 App This function is now available in Windows Store apps mode.
Versions 21 and later
Universal Windows 10 App This function is now available in Universal Windows 10 App mode.
New in version 21
Universal Windows 10 App This function is now available in Universal Windows 10 App mode.
Universal Windows 10 App This function is now available in Universal Windows 10 App mode.
Versions 26 and later
Apple Watch This function is now available for Apple Watch applications.
New in version 26
Apple Watch This function is now available for Apple Watch applications.
Apple Watch 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 the Sunday of the 52nd week and January 1st are in week 53.
AndroidAndroid Widget iPhone/iPadApple WatchUniversal Windows 10 AppJava

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 : wd260std.dll
Minimum version required
  • Version 9
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