Crystal Reports Enterprise Record Filter Formula Month to Date

I'm fairly new to Crystal Reports for Enterprise and searched this question but didn't see anyone answering it. When I build a Crystal Report and want to filter by Current Month each time how do I write the code in the Formula Record Filter? I have a current set of data with labor utilization. I'd like to only see this month's numbers per employee each time I run it without using a static filter or prompt.

Thanks in advance for your help.