Priority: Boo!

As the nation gears up for autumn traditions, the Postal Service will release its Spooky Silhouettes stamps Friday, Oct. 11, in time for Halloween.

The four stamps feature digital illustrations with Halloween motifs — including a cat, raven, ghosts, spider and bats — rendered as black silhouettes in windows that are backlit with eerily evocative shades of green, orange, red and purple.

With a heritage dating back centuries and customs that vary widely by community, Halloween has long been a holiday that lets us delight in things that scare us. These new stamps offer fun, frightful scenes that symbolize this annual event.

Halloween now inspires parades and carnivals, corn mazes and haunted houses, neighborhood and school parties, pumpkin festivals and more. No matter how or where people observe this ever-changing holiday in the 21st century, it remains an anticipated celebration of the macabre in the face of approaching winter.

Tyler Lang created the artwork for the stamps, and Greg Breeding served as the art director and stamp designer.

The stamps will be available in panes of 20 at Post Offices and