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Return date of last Sunday

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Trying to work out a formula to return the date of the previous Sunday, unless the date entered is a Sunday. I don't see anything in Date.au3 to do this, unfortunately.

Any help is appreciated.

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Trying to work out a formula to return the date of the previous Sunday, unless the date entered is a Sunday. I don't see anything in Date.au3 to do this, unfortunately.

Any help is appreciated.

#include <Date.au3>
Global $lastsundaydate

$inputdate = "00/00/0000";MM/DD/YYYY
$inputdatearray = StringSplit($inputdate, "/")
$inputdayofweek = _DateToDayOfWeek($inputdatearray[3], $inputdatearray[1], $inputdatearray[2])
If @ERROR <> 1 Then
    Select
        Case $inputdayofweek = 1
            MsgBox(48,"","The date entered is a Sunday!")
        Case $inputdayofweek = 2
            $lastsundaydate = _DateAdd("D", -1, $inputdatearray[3] & "/" & $inputdatearray[1] & "/" & $inputdatearray[2])
        Case $inputdayofweek = 3
            $lastsundaydate = _DateAdd("D", -2, $inputdatearray[3] & "/" & $inputdatearray[1] & "/" & $inputdatearray[2])
        Case $inputdayofweek = 4
            $lastsundaydate = _DateAdd("D", -3, $inputdatearray[3] & "/" & $inputdatearray[1] & "/" & $inputdatearray[2])
        Case $inputdayofweek = 5
            $lastsundaydate = _DateAdd("D", -4, $inputdatearray[3] & "/" & $inputdatearray[1] & "/" & $inputdatearray[2])
        Case $inputdayofweek = 6
            $lastsundaydate = _DateAdd("D", -5, $inputdatearray[3] & "/" & $inputdatearray[1] & "/" & $inputdatearray[2])
        Case $inputdayofweek = 7
            $lastsundaydate = _DateAdd("D", -6, $inputdatearray[3] & "/" & $inputdatearray[1] & "/" & $inputdatearray[2])
    EndSelect
    If $lastsundaydate <> "" Then
        MsgBox(0,"Previous Sunday's Date","The last Sunday prior to the date entered was " & $lastsundaydate & ".")
    EndIf
EndIf

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#include <Date.au3>
Global $lastsundaydate

$inputdate = "00/00/0000";MM/DD/YYYY
$inputdatearray = StringSplit($inputdate, "/")
$inputdayofweek = _DateToDayOfWeek($inputdatearray[3], $inputdatearray[1], $inputdatearray[2])
If @ERROR <> 1 Then
    Select
        Case $inputdayofweek = 1
            MsgBox(48,"","The date entered is a Sunday!")
        Case $inputdayofweek = 2
            $lastsundaydate = _DateAdd("D", -1, $inputdatearray[3] & "/" & $inputdatearray[1] & "/" & $inputdatearray[2])
        Case $inputdayofweek = 3
            $lastsundaydate = _DateAdd("D", -2, $inputdatearray[3] & "/" & $inputdatearray[1] & "/" & $inputdatearray[2])
        Case $inputdayofweek = 4
            $lastsundaydate = _DateAdd("D", -3, $inputdatearray[3] & "/" & $inputdatearray[1] & "/" & $inputdatearray[2])
        Case $inputdayofweek = 5
            $lastsundaydate = _DateAdd("D", -4, $inputdatearray[3] & "/" & $inputdatearray[1] & "/" & $inputdatearray[2])
        Case $inputdayofweek = 6
            $lastsundaydate = _DateAdd("D", -5, $inputdatearray[3] & "/" & $inputdatearray[1] & "/" & $inputdatearray[2])
        Case $inputdayofweek = 7
            $lastsundaydate = _DateAdd("D", -6, $inputdatearray[3] & "/" & $inputdatearray[1] & "/" & $inputdatearray[2])
    EndSelect
    If $lastsundaydate <> "" Then
        MsgBox(0,"Previous Sunday's Date","The last Sunday prior to the date entered was " & $lastsundaydate & ".")
    EndIf
EndIf
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Something like this?

$Last_Sundays_date=_DateAdd( 'd',-_DateToDayOfWeek (@YEAR, @MON, @MDAY)+1, _NowCalc())
Thanks!

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Trying to work out a formula to return the date of the previous Sunday, unless the date entered is a Sunday. I don't see anything in Date.au3 to do this, unfortunately.

Any help is appreciated.

Check it out! :)

#include <Date.au3>
$Date = InputBox("Date", "Input a date in the following format:"&@CRLF&"MM/DD/YYYY", @MON&"/"&@MDAY&"/"&@YEAR)
$Temp = StringSplit($Date,"/")
$Month = $Temp[1]
$day = $Temp[2]
$Year = $Temp[3]
$WDay = CalcWeekday($Month, $Day, $Year)
$DayName = CalcWeekday($Month, $Day, $Year,0,1)
If $WDay>1 Then
    $sJulDate = _DateToDayValue ($Year, $Month, $Day)
    Dim $Y, $M, $D
    $sJulDate = _DayValueToDate ($sJulDate-$WDay, $Y, $M, $D)
    MsgBox(4096, "", "You entered " & $DayName &" "& $Date &@CRLF& "The previous Sunday was "&$WDay&" days ago: " & $M & "/" & $D & "/" & $Y)
Else
    MsgBox(0,"", "You entered " & $DayName &" "& $Date)
EndIf

Func CalcWeekday($Month,$Day,$Year,$Cal=0,$Name=0)
$a = Floor((14 - $month) / 12)
$y = $year - $a
$m = $month + 12*$a - 2
$gregorian = Mod($day + $y + Floor($y/4) - Floor($y/100) + Floor($y/400) + Floor((31*$m)/12),7);gregorian
$julian = Mod(5 + $day + $y + Floor($y/4) + Floor((31*$m)/12),7);julian
If $Cal = 0 Then
    $Num = Floor($gregorian)
Else
    $Num =Floor($julian)
EndIf
Dim $Day[7] = ["Sunday","Monday","Tuesday","Wednesday","Thursday","Friday","Saturday"]
If $Name then Return $Day[$Num]
Return $Num
EndFunc

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What's wrong with my one-liner ? too simple ?

:)

Turtles.

:)

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What's wrong with my one-liner ? too simple ?

:)

I read it as the poster wanting to input a date. Your one-liner works great, but you'd have to add a few more lines if you wanted to base it on a user input date.


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What's wrong with my one-liner ? too simple ?

:)

More is better?

Why use one line when you can easily use a hundred lines?


George

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More is better?

Depends on the "matter at hand"

Why use one line when you can easily use a hundred lines?

Simple: Less typing. I am the lazy type.

:)


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