Pasted

$orig = "http://acmeprd/schedule"
$dest = "http://acmedev/schedule"
 
$web = get-spweb $dest
 
$cal = $web.Lists["Room Schedule"]
$views = $cal.Views|%{$_}
foreach($v in $views){
    if($v.CalendarSettings -ne $null -and $v.CalendarSettings -match $orig){
        $v.Title
        $v.CalendarSettings = $v.CalendarSettings.Replace($orig, $dest)
        $v.Update()
    }
}