Notification based on Role and Date

I am trying to create a notification that only appears if someone is in a specific role (in this case EOM) and if it is the first day of each month. This condition part of the notification will not allow me to check for both a bool (${Security.IsInRole("EOM")} and a datetime. Any suggestion on how to set this up? I also tried to set up a property call EOM that contained the letters EOM (string format), but I cannot use a condition containing a string and a datetime either.

Why? Can you elaborate? Using conditions is a simple as chaining them with &&
${Security.IsInRole("Role") && DateTime.Now.Day == 1}

Ok, that was all it was..I was treating them as seperate variables instead of enclosing them within the same ${}. LIke I showed in my question I had ${Security.IsInRole("EOM")} AND a datetime. Thank you for clarifying that!