Conditional Formatting on this Annual Leave Form

Hi All,

Further to an earlier post, can someone take a look at my attached Annual Leave Form. With reference to the calendar, currently the Saturday AMs are coloured grey (which means this is a weekend) and the Saturday PMs have no fill colour (which signifies a working day). In fact, it should be the reverse. Saturday AMs should be no fill and Saturday PMs should be grey. Can someone look into why the conditional formatting formula isn't functioning the way I thought it would and possibly resolve for me?

Thanks.