[davidw]

Here's my latest edits (in case someone else wants to try it):

I've somewhat modified the instructions:

first off go to your navbar template and find:
==============================================
<div style="padding: 0.5em;" nowrap="nowrap">
<strong><phrase 1="$bbuserinfo[username]">$vbphrase[welcome_x]</phrase></strong><br />
==============================================

and replace that with
<div style="padding: 0.5em;" nowrap="nowrap">
<strong>$ng_greeting</strong><br />

PHP Code:

    <plugins>
        <plugin active="1">
            <title>Nicer Greeting On NavBar</title>
            <hookname>global_start</hookname>
            <phpcode><![CDATA[// Nicer Greeting On NavBar

$ng_date = date("G");
$ng_tz_useroffset = $vbulletin->userinfo['timezoneoffset'];
$ng_result = bcadd($ng_date, $ng_tz_useroffset);

$ng_greeting = "ERROR";

if($ng_result < 12){
    $ng_greeting = "<phrase 1="$bbuserinfo[username]">" . $vbphrase[ng_goodmorning] . " . </phrase>";
} elseif($ng_result < 18){
    $ng_greeting = "<phrase 1="$bbuserinfo[username]">" . $vbphrase[ng_goodafternoon] . " . </phrase>";
}else {
    $ng_greeting = "<phrase 1="$bbuserinfo[username]">" . $vbphrase[ng_goodevening] . " . </phrase>";
}
// Nicer Greeting On NavBar
]]></phpcode>
        </plugin>
    </plugins>
    <phrases>
        <phrasetype name="GLOBAL" fieldname="global">
            <phrase name="ng_goodafternoon"><![CDATA[Good Afternoon, {1}]]></phrase>
            <phrase name="ng_goodevening"><![CDATA[Good Evening, {1}]]></phrase>
            <phrase name="ng_goodmorning"><![CDATA[Good Morning, {1}]]></phrase>
        </phrasetype>
    </phrases> 


Edit: forgot semicolon after "ERROR"