[thelist] PHP Date question

[Casey Crookston]

>>$newDateStart->modify("-4 hours");<<

Hmmm.

$dStart .= modify("-4 hours");
$dStart = $dStart->modify("-4 hours");
$dStart->modify("-4 hours");

All three of these error out.  And, I am not given an error. The page
load just stops.

Errg.

Casey