San Antonio, United States

San Antonio follows Central Standard Time at UTC−6 and observes daylight saving time. It shares its clock with Dallas, Houston, and Chicago throughout the year.

When it is 10 AM in San Antonio, New York reads 11 AM, London shows 5 PM, and Seoul has already reached midnight. Military coordination at Joint Base San Antonio requires precise awareness of these differences.

With a booming cybersecurity sector and deep military ties, San Antonio plays an important role in defense communications that operate around the clock.