Calendar Conditional Formatting - Only Highlight Second Instance

Hi,

I am building a calendar into a spreadsheet - and like most calendars, because a month may not start end on Monday/Sunday, there are end of the previous/next month listed.

If I were trying to use Conditional Formatting to highlight a date, but the date appears twice (once at the end of the previous month, and again in the appropriate month), how would I only highlight the second instance?

Thank you in advance - any assistance would be appreciated

I need to amend my thread - I don't need the second instance, I need the instance that is connected to the correct month.