Member Report - Filtering for Birth Months for Member Birthday Cards

Every month, we send out birthday cards to all of our players who are celebrating a birthday in the upcoming month. I tested the "Member Report" to see if there was an easy way to figure out who has an upcoming birthday. Although Date of Birth is a field in the report, it sorts based on the entire date (year/month/day).  Aside from exporting to Excel, it would be helpful to have an easy way to isolate birth month.