don't know of built in one. the function i'd use, though, is as follows:
function isLeapYear ($year)
{
returns 1 or 0
because of the funny boolean thing.
return ((($year % 400) == 0) || ((($year % 4) == 0) && (($year % 100) != 0)));
}
the logic is that its a leap year if the year is divisible by 4, but not by 100 - unless by 400.
hope this helps
any problems mail me.
