Oslo is 7 hours ahead of Houston. Oslo uses Central European Time (CET/CEST, UTC+1/+2) while Houston uses Central Time (CST/CDT, UTC-6/-5). When it's 12:00 PM in Oslo, it's 5:00 AM in Houston.
Both cities observe daylight saving time on similar schedules, so the 7-hour difference remains relatively constant year-round.
Best calling time: 4:00 PM - 11:00 PM Oslo time. This corresponds to 9:00 AM - 4:00 PM in Houston, covering business hours.
Oslo and Houston have strong connections through the energy industry. Houston is the oil capital of the US, while Norway is a major oil producer. Many Norwegian energy companies have operations in Houston.