CNS TV U.S. Postal Service Inspires Kids to Write WASHINGTON – April is National Card and Letter Writing month. The United States Postal Service is celebrating by issuing a new Forever stamp inspiring kids at the Friendship Public Charter School in D.C. to personalize their heart-felt messages. Share this:Click to share on X (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to share on Reddit (Opens in new window)Click to email a link to a friend (Opens in new window)Click to print (Opens in new window)