Use this script to get a DateTime object representing the holiday you wish to
lookup.
Used to find date of holidays that fall on different days of the year obviously.
Example US Thanksgiving is the 4th Thursday of November
Dim search As notesdatetime
Sub Initialize
h_year = 2000 ' year of desired date
h_dow = 5 ' represents the day of week.. sunday being 1 saturday being 7
h_mon = "November" ' This is the month that you want the holiday listed.
h_which = 4 ' numeric value of how many of the day of week. This example
' will return the 4th thursday in november [Thanksgiving US]
' For last week.. use 10
Call find_holiday(h_year,h_dow,h_mon,h_which)
End Sub
Function find_holiday(h_year,h_dow,h_mon,h_which)
Dim dayofweek As Variant

Set search = New notesdatetime(h_mon + " 1, " + Str(h_year))
dayofweek = Evaluate("@WeekDay([" + search.localtime + "])")
s_month = Evaluate("@Month([" + search.localtime + "])")
s_dow = dayofweek(0)
If(s_dow > h_dow) Then
Call search.AdjustDay(7 - (s_dow - h_dow))
Else
Call search.AdjustDay(h_dow - s_dow)
End If
week_number = 1
While(week_number <> h_which)
Call search.AdjustDay(7)
week_number = week_number + 1
c_month = Evaluate("@Month([" + search.localtime + "])")
If(c_month(0) <> s_month(0)) Then ' went beyond end of month
If(c_which <> 10) Then
Msgbox " Error: Number of weeks exceeded month limit"
Exit Function
Else
Call.search.Adjustday(-7)
Goto break_out
End If
End If
Wend
break_out:
End Function

This was first published in November 2000

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