May is Jewish American Heritage Month.
If you're researching your Jewish ancestry, you'll want to visit the Jewish Genealogical Society of Illinois in Northbrook. The have a research library with over 800 volumes on Jewish genealogy and host programs once a month. JGSI also maintains a searchable Online Death Index, a database of death records from local cemeteries.
Another great local resource is the Guide to Jewish Genealogy in Chicagoland by Mike Karsen.