programming-examples/asp/Data_Access_DateTime/Format Dates.asp

<%
Function fncGetDayOrdinal( _
ByVal intDay _
)
' Accepts a day of the month as an integer and returns the
' appropriate suffix

Dim strOrd

Select Case intDay
Case 1, 21, 31
strOrd = "st"
Case 2, 22
strOrd = "nd"
Case 3, 23
strOrd = "rd"
Case Else
strOrd = "th"
End Select

fncGetDayOrdinal = strOrd
End Function ' fncGetDayOrdinal



Function fncFmtDate( _
ByVal strDate, _
ByRef strFormat _
)
' Accepts strDate as a valid date/time,
' strFormat as the output template.
' The function finds each item in the
' template and replaces it with the
' relevant information extracted from strDate

' Template items (example)
' %m Month as a decimal (02)
' %B Full month name (February)
' %b Abbreviated month name (Feb )
' %d Day of the month (23)
' %O Ordinal of day of month (eg st or rd or nd)
' %j Day of the year (54)
' %Y Year with century (1998)
' %y Year without century (98)
' %w Weekday as integer (0 is Sunday)
' %a Abbreviated day name (Fri)
' %A Weekday Name (Friday)
' %H Hour in 24 hour format (24)
' %h Hour in 12 hour format (12)
' %N Minute as an integer (01)
' %n Minute as optional if minute <> 0
' %S Second as an integer (55)
' %P AM/PM Indicator (PM)

On Error Resume Next

Dim intPosItem
Dim int12HourPart
Dim str24HourPart
Dim strMinutePart
Dim strSecondPart
Dim strAMPM

' Insert Month Numbers
strFormat = Replace(strFormat, "%m", _
DatePart("m", strDate), 1, -1, vbBinaryCompare)

' Insert non-Abbreviated Month Names
strFormat = Replace(strFormat, "%B", _
MonthName(DatePart("m", strDate), _
False), 1, -1, vbBinaryCompare)

' Insert Abbreviated Month Names
strFormat = Replace(strFormat, "%b", _
MonthName(DatePart("m", strDate), _
True), 1, -1, vbBinaryCompare)

' Insert Day Of Month
strFormat = Replace(strFormat, "%d", _
DatePart("d",strDate), 1, _
-1, vbBinaryCompare)

' Insert Day of Month Ordinal (eg st, th, or rd)
strFormat = Replace(strFormat, "%O", _
fncGetDayOrdinal(Day(strDate)), _
1, -1, vbBinaryCompare)

' Insert Day of Year
strFormat = Replace(strFormat, "%j", _
DatePart("y",strDate), 1, _
-1, vbBinaryCompare)

' Insert Long Year (4 digit)
strFormat = Replace(strFormat, "%Y", _
DatePart("yyyy",strDate), 1, _
-1, vbBinaryCompare)

' Insert Short Year (2 digit)
strFormat = Replace(strFormat, "%y", _
Right(DatePart("yyyy",strDate),2), _
1, -1, vbBinaryCompare)

' Insert Weekday as Integer (eg 0 = Sunday)
strFormat = Replace(strFormat, "%w", _
DatePart("w",strDate,1), 1, _
-1, vbBinaryCompare)

' Insert Abbreviated Weekday Name (eg Sun)
strFormat = Replace(strFormat, "%a", _
WeekdayName(DatePart("w",strDate,1),True), 1, _
-1, vbBinaryCompare)

' Insert non-Abbreviated Weekday Name
strFormat = Replace(strFormat, "%A", _
WeekdayName(DatePart("w",strDate,1),False), 1, _
-1, vbBinaryCompare)

' Insert Hour in 24hr format
str24HourPart = DatePart("h",strDate)
If Len(str24HourPart) < 2 Then str24HourPart = "0" & _
str24HourPart
strFormat = Replace(strFormat, "%H", str24HourPart, 1, _
-1, vbBinaryCompare)

' Insert Hour in 12hr format
int12HourPart = DatePart("h",strDate) Mod 12
If int12HourPart = 0 Then int12HourPart = 12
strFormat = Replace(strFormat, "%h", int12HourPart, 1, _
-1, vbBinaryCompare)

' Insert Minutes
strMinutePart = DatePart("n",strDate)
If Len(strMinutePart) < 2 Then _
strMinutePart = "0" & strMinutePart
strFormat = Replace(strFormat, "%N", strMinutePart, _
1, -1, vbBinaryCompare)

' Insert Optional Minutes
If CInt(strMinutePart) = 0 Then
strFormat = Replace(strFormat, "%n", "", 1, _
-1, vbBinaryCompare)
Else
If CInt(strMinutePart) < 10 Then _
strMinutePart = "0" & strMinutePart
strMinutePart = ":" & strMinutePart
strFormat = Replace(strFormat, "%n", strMinutePart, _
1, -1, vbBinaryCompare)
End If

' Insert Seconds
strSecondPart = DatePart("s",strDate)
If Len(strSecondPart) < 2 Then _
strSecondPart = "0" & strSecondPart
strFormat = Replace(strFormat, "%S", strSecondPart, 1, _
-1, vbBinaryCompare)

' Insert AM/PM indicator
If DatePart("h",strDate) >= 12 Then
strAMPM = "PM"
Else
strAMPM = "AM"
End If

strFormat = Replace(strFormat, "%P", strAMPM, 1, _
-1, vbBinaryCompare)

fncFmtDate = strFormat

'If there is an error output its value
If Err.number <> 0 Then
Response.Clear
Response.Write "ERROR " & Err.number & _
": fmcFmtDate - " & Err.description
Response.Flush
Response.End
End If
End Function ' fncFmtDate
%>