Do you want to know if a date falls in a leap year:
<%
Dim iYear
iYear = Year(Date)
if (iYear mod 4 = 0) AND ((iYear mod 100 <> 0) OR (iYear mod 400 = 0)) then
' It is a Leap Year
end if
%>
The Result
2024 is a Leap Year
asp leap year is it a leap year