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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).
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.
Universal Windows 10 AppAndroidAndroid Widget iPhone/iPadIOS WidgetApple WatchMac CatalystJava

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
See also
Minimum version required
  • Version 9
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