[Adrian Schneider]

Something like this (in global_start plugin) would work:

PHP Code:

$hour = date('G');

if ($hour < 23 or $hour >= 5)
{
    standard_error('Some message to display when the board is closed.');
} 


This is your server time, let me know if you want it user time instead (though, they could technically keep altering the time before their time is up...)


a big nevermind if you mean an actual forum and not your site, though the same method can be applied...