Find ugenr, dagnr i ugen, dagens nr. i året p.g.a. dato.

Kig på DatePart

DatePart Function
     

Returns a Variant (Integer) containing the specified part of a given date.

Syntax

DatePart(interval, date[,firstdayofweek[, firstweekofyear]])

The DatePart function syntax has these named arguments:

Part Description
interval Required. String expression that is the interval of time you want to return.
date Required. Variant (Date) value that you want to evaluate.
firstdayofweek Optional. A constant that specifies the first day of the week. If not specified, Sunday is assumed.
firstweekofyear Optional. A constant that specifies the first week of the year. If not specified, the first week is assumed to be the week in which January 1 occurs.


Settings

The interval argument has these settings:

Setting Description
yyyy Year
q Quarter
m Month
y Day of year
d Day
w Weekday
ww Week
h Hour
n Minute
s Second


The firstdayofweek argument has these settings:

Constant Value Description
vbUseSystem 0 Use the NLS API setting.
vbSunday 1 Sunday (default)
vbMonday 2 Monday
vbTuesday 3 Tuesday
vbWednesday 4 Wednesday
vbThursday 5 Thursday
vbFriday 6 Friday
vbSaturday 7 Saturday


The firstweekofyear argument has these settings:

Constant Value Description
vbUseSystem 0 Use the NLS API setting.
vbFirstJan1 1 Start with week in which January 1 occurs (default).
vbFirstFourDays 2 Start with the first week that has at least four days in the new year.
vbFirstFullWeek 3 Start with first full week of the year.


Remarks

You can use the DatePart function to evaluate a date and return a specific interval of time. For example, you might use DatePart to calculate the day of the week or the current hour.

The firstdayofweek argument affects calculations that use the "w" and "ww" interval symbols.

If date is a date literal, the specified year becomes a permanent part of that date. However, if date is enclosed in double quotation marks (" "), and you omit the year, the current year is inserted in your code each time the date expression is evaluated. This makes it possible to write code that can be used in different years.

Note  For date, if the Calendar property setting is Gregorian, the supplied date must be Gregorian. If the calendar is Hijri, the supplied date must be Hijri.

The returned date part is in the time period units of the current Arabic calendar.  For example, if the current calendar is Hijri and the date part to be returned is the year, the year value is a Hijri year.

Dim sDate As String
    sDate = "150303"
   
    MsgBox Format((CDate(Mid$(sDate, 1, 2) & "/" & Mid$(sDate, 3, 2) & "/" & Mid$(sDate, 5, 2))), "long date")

Ups... det var ikke det hele:

    Dim sDate As String
    Dim dt As Date
    Dim str As String
   
    sDate = "150303"
   
    dt = CDate(Mid$(sDate, 1, 2) & "/" & Mid$(sDate, 3, 2) & "/" & Mid$(sDate, 5, 2))
   
    str = str & "Date: " & Format(dt, "long date") & vbLf
    str = str & "Weekday: " & Weekday(dt, vbMonday) & " " & WeekdayName(Weekday(dt, vbMonday)) & vbLf
    str = str & "Week: " & Format(dt, "ww") & vbLf
    str = str & "Day of year: " & CLng(dt) - CLng(DateSerial(Year(dt), 1, 1))

    MsgBox str

Endnu engang tak for hjælpen!

Dim sDate As String
    Dim dt As Date
    Dim str As String
   
    sDate = "150303"
   
    dt = CDate(Mid$(sDate, 1, 2) & "/" & Mid$(sDate, 3, 2) & "/" & Mid$(sDate, 5, 2))
   
    str = str & "Date: " & Format(dt, "long date") & vbLf
    str = str & "Weekday: " & DatePart("w", dt, vbUseSystem, vbUseSystem) & vbLf
    str = str & "Week: " & DatePart("ww" dt, vbUseSystem, vbUseSystem) & vbLf
    str = str & "Day of year: " & DatePart("y", dt, vbUseSystem, vbUseSystem)

    MsgBox str

Den løsning, jeg har skrevet, bruger kontrolpanelets indstillinger til at finde ud af dagnummer og ugenummer.