Most of Texas operates on the Central Time Zone, but the state is actually split across two different time zones. While major metropolitan areas like Houston, Dallas, Austin, and San Antonio follow Central Time, the far western edge of the state runs on the Mountain Time Zone. Understanding how Texas divides its clocks prevents missed flights, scheduling errors, and confusion when driving across the state.
The division involves a specific geographic split affecting only a couple of western counties. Both zones observe Daylight Saving Time (DST), meaning clocks move forward one hour in the spring and back one hour in the fall.
The Central Time Zone in Texas
The vast majority of Texas—roughly 252 out of 254 counties—lies within the Central Time Zone. This includes all major population centers, the state capital of Austin, the Panhandle, and the Gulf Coast.
- Central Standard Time (CST): UTC-6, active from early November to mid-March.
- Central Daylight Time (CDT): UTC-5, active during daylight saving months from mid-March to early November.
When people think of Texas business hours, television broadcasts, or statewide schedules, they're almost always referencing Central Time. Cities like Dallas and Houston operate seamlessly on this schedule alongside neighboring states like Oklahoma, Louisiana, and Arkansas. Further analysis on this matter has been shared by BBC.
The Mountain Time Zone in Texas
Only a small sliver of far West Texas uses the Mountain Time Zone. This region sits one hour behind the rest of the state.
- Mountain Standard Time (MST): UTC-7, active during standard time months.
- Mountain Daylight Time (MDT): UTC-6, active during daylight saving months.
Two specific counties make up this western exception: El Paso County and Hudspeth County. Additionally, a small northwestern pocket of Culberson County near Guadalupe Mountains National Park aligns informally or practically with Mountain Time due to its proximity to New Mexico.
El Paso, located directly on the border with New Mexico and across the Rio Grande from Ciudad Juárez, Mexico, shares a timezone with neighboring Mountain Time cities like Albuquerque and Denver rather than with Dallas or Houston.
Daylight Saving Time Observance in Texas
Texas observes Daylight Saving Time uniformly across both time zones. When the time changes, the entire state shifts together, preserving the one-hour gap between Central and Mountain regions.
Clocks spring forward on the second Sunday of March and fall back on the first Sunday of November. State lawmakers have occasionally introduced bills to abolish or modify DST, but federal regulations currently require Texas to continue seasonal time changes alongside most of the United States. You can check official time change schedules directly through resources like the National Institute of Standards and Technology.
Traveling Across Texas Time Zones
Driving from San Antonio to El Paso requires crossing an invisible boundary that shifts your clock back by an entire hour. Interstate 10 travelers cross this transition zone in Hudspeth County, just east of El Paso.
If you're planning a cross-state road trip or scheduling virtual meetings across different regions of Texas, keep these practical tips in mind:
- Always specify the city or time zone when scheduling calls between El Paso and Central Texas.
- Cell phones usually update automatically when crossing the county line on I-10, but older manual clocks in vehicles won't.
- Local businesses near the border counties are accustomed to the time difference, but transport schedules assume Mountain Time in El Paso and Central Time elsewhere.
For more details on official US boundaries, consult the Department of Transportation time zone maps.
Frequently Asked Questions
Does all of Texas share the same time zone?
No. While most of Texas uses Central Time, El Paso County and Hudspeth County in the far western region use Mountain Time.
What major cities in Texas are on Mountain Time?
El Paso is the only major city in Texas located in the Mountain Time Zone. Other cities like Houston, Dallas, Austin, San Antonio, Fort Worth, and El Paso's neighbor, Corpus Christi, are all on Central Time.
Does Texas observe Daylight Saving Time?
Yes. The entire state of Texas shifts clocks forward in March and backward in November.
How far ahead is Central Texas compared to El Paso?
Central Texas (including Austin, Dallas, and Houston) is always exactly one hour ahead of El Paso, regardless of the time of year.
