Need to add public holidays? How

HiI have the following script and it works fine with two dates and half days however I need to add more script to deduct public holidays, could be multiple within the dates chosen, between Christmas/New Year there are usually 4-5 public holidays. Any advice would be greatly appreiciated.

Coll

See Code below:

Sub Postrecalc(Source As Notesuidocument)

Dim ws As New NotesUIWorkspace

Dim uidoc As NotesUIdocument

Set uidoc=ws.currentDocument

Dim doc As NotesDocument

Set doc = source.Document



Const Saturday = 7

Const Sunday = 1

’ must have valid dates…

If doc.StartDate(0)="" Or doc.EndDate(0)="" Then 

	Exit Sub

End If



Dim count As Integer 

count = 0 ' half days



Dim dtVacationDayStart As New NotesDateTime(doc.startdate(0) )

Dim dtVacationDayEnd As New NotesDateTime(doc.enddate(0) )

'Determine if the user has requested an end date before the start date

If dtVacationDayStart.TimeDifference(dtVacationDayEnd ) > 0 Then

	Messagebox "you can't do that"

	Exit Sub 

Else

	Dim strVacationDate As String

	strVacationDate=dtVacationDayStart.DateOnly

	Dim dtVacationDay As New NotesDateTime(strVacationDate )

	Dim vacationdays As Integer

	Dim itemHolidays As NotesItem

	Set itemHolidays=doc.GetFirstItem("Holidays")

	Dim w As Integer 

	While Not (dtVacationDay.dateOnly >dtVacationDayEnd.DateOnly)

		If Not (Weekday(dtVacationDay.DateOnly)=Saturday Or Weekday(dtVacationDay.DateOnly)=Sunday) Then

			If Not(ItemHolidays.Contains(dtVacationDay)) Then

				count=count+2

			End If

		End If

		Call dtVacationDay.AdjustDay(1)

	Wend

’ adjust for half days…

	If doc.HalfDay(0) <> "" Then count = count - 1

	If doc.EndHalf(0) <> "" Then count = count - 1

	doc.TotalDays2 = count / 2 ' display result

	

End If

'Call uidoc.Refresh

End Sub