Based on the search results, there was an emergency alert test that occurred on Wednesday, October 4, 2023, at 2:20 p.m. EDT. The test was a nationwide test of the Emergency Alert System issued by the Federal Emergency Management Agency (FEMA) . The test was broadcasted on all U.S. cellphones, TVs, and radios. The message read, "This is a nationwide test of the Emergency Alert System, issued by the Federal Emergency Management Agency, covering the United States from 14:20 to 14:50 hours ET. This is only a test. No action is required by the public".