I have set date and time variables by using:
$date = date("Y-m-d");
$time = date("H:i:s");

This will give me the date and time according the system time on my server, which uses Eastern Daylight Time.

However, I want to display the date and time on my web page showing Pacific Daylight Time. In other words, I want to show a date and time that is 3 hours less than the time returned by the statement above.

How can I modify my statements above to return the date and time minus 3 hours?