Monterrey and Houston are usually on the same time. Both cities use Central Time (CST/CDT, UTC-6/-5). When it's 12:00 PM in Monterrey, it's also 12:00 PM in Houston.
Both cities observe daylight saving time on similar schedules, keeping them synchronized year-round.
Any time works! Since both cities share the same time zone, you can call during normal business hours (9:00 AM - 6:00 PM) without any conversion needed.
Monterrey and Houston have extensive business connections, particularly in energy, manufacturing, and trade. Houston is a major hub for Mexican business in the United States. Direct flights take about 1.5 hours.