Date Function : IsGoodFriday


When I worked for an insurance company, Good Friday was a work day but not a business day. Only certain batch processes needed to run.


'*****************************************************************
'*  Function Name   : bIsGoodFriday                              *
'*  Created By      : Thomas A. Cassano                          *
'*  date            : 00/00/98                                   *
'*  Purpose         : Determines whether the day is Good Friday  *
'*  Arguments       : dCompare_date                              *
'*  Returns         : Boolean                                    *
'*  Comments        : None                                       *
'*****************************************************************
Function bIsGoodFriday(dCompare_date as date) as Boolean

   Dim iCurrent_Year             as Integer
   Dim a, b, c, d, e             as Integer
   Dim dEasterSunday             as date
   Dim dGoodFriday               as date
   Dim iDayOfEasterSunday        as Integer
   Dim iMonthOfEasterSunday      as Integer

   iCurrent_Year = Year(dCompare_date)

   a = iCurrent_Year Mod 19
   b = iCurrent_Year Mod 4
   c = iCurrent_Year Mod 7
   d = (19 * a + 24) Mod 30
   e = (2 * b + 4 * c + 6 * d + 5) Mod 7

   iDayOfEasterSunday = 22 + d + e

   iMonthOfEasterSunday = 3

   If iDayOfEasterSunday > 31 then
      iDayOfEasterSunday = d + e - 9
      iMonthOfEasterSunday = 4
   End If

   If iDayOfEasterSunday = 26 And iMonthOfEasterSunday = 4 then
      iDayOfEasterSunday = 19
   End If

   If iDayOfEasterSunday = 25 And iMonthOfEasterSunday = 4 And d = 28 And _
      e = 6 And a > 10 then
      iDayOfEasterSunday = 18
   End If

   dEasterSunday = DateSerial(iCurrent_Year, iMonthOfEasterSunday, _
                   iDayOfEasterSunday)

   dGoodFriday = DateAdd("d", -2, dEasterSunday)

   bIsGoodFriday = dGoodFriday = dCompare_date

End Function