Unofficial use in several communities in Russell County, Alabama, including Phenix City. Although the legal time for all of Alabama during the standard time period is Central Time (UTC–6), Phenix City and its surrounding communities informally synchronize their clocks with the considerably larger city of Columbus, Georgia, directly across the Chattahoochee River from Phenix City.
Central and eastern areas (most of country except Quintana Roo). In most of Mexico, daylight time starts a few weeks after the United States. Communities on the U.S. border that observe Central Time follow the U.S. daylight time schedule.