EXCEL help needed - format within conditional formatting

[Joebob]

I'm struggling with something in Excel and need a little help if possible.

In the above spreadsheet I am trying to use Conditional Formatting to make the cells grey out once the date and time have passed.

I can make them grey out after the date but I'm struggling with the time.

Any help really appreciated.

 

[Joebob]

I'm afraid that neither of the above solutions work.