How to configure business hours if only one Saturday is working day in each month?

Hi,

I am configuring RT 4.4.1 for the first time. I have configured business hours in RT_SiteConfig.pm file as below:

Set ( %ServiceBusinessHours, (
‘Default’ => {
1 => { Name => ‘Monday’, Start => ‘9:00’, End => ‘21:00’ },
2 => { Name => ‘Tuesday’, Start => ‘9:00’, End => ‘21:00’ },
3 => { Name => ‘Wednesday’, Start => ‘9:00’, End => ‘21:00’ },
4 => { Name => ‘Thursday’, Start => ‘9:00’, End => ‘21:00’ },
5 => { Name => ‘Friday’, Start => ‘9:00’, End => ‘21:00’ },
},
));

This is working perfectly. But, I want to add 1st Saturday also in business hours.

Could you please tell me how can I do this?

Thanks,
Ravi