Date calculation (add one day)

Anon

Can someone help me with what is probably a simple problem? I have a date in the format
"12/18/2001" . I need to get the previous and next dates in the same type of format.
I was hoping I could find some type of julian functions so that I could :
1) convert to julian
2) add or subtract 1
3) convert back

I can't figure out what PHP's julian functions want supplied and how to convert back or .....
Is there a simpler way ?

thecookie

Time & Date funtions:
http://download.php.net/manual/en/ref.datetime.php

mktime:
http://download.php.net/manual/en/function.mktime.php

Anon

Here's what I came up with to increment and decrement dates that are already in the format
mm/dd/yyyy .

<?
$today=date("m/d/Y");
$tomorrow =date("m/d/Y", mktime (0,0,0,date("m") ,date("d")+1,date("Y")));
$yesterday =date("m/d/Y", mktime (0,0,0,date("m") ,date("d")-1,date("Y")));
$testtomorrow =date("m/d/Y", mktime (0,0,0,12,31+1,2001));
$testyesterday =date("m/d/Y", mktime (0,0,0,01,01-1,2002));
print "Today is: $today<br>";
print "Tomorrow is : $tomorrow<br>";
print "Yesterday was : $yesterday<br>";
print "The day after 12/31/2001 is: $testtomorrow<br>";
print "The day before 01/01/2002 was: $testyesterday";
?>