Houston Time vs Sydney Time
What is the time difference between Houston, Texas and Sydney, Australia? 15 hours ahead of Houston. Live clocks, conversion tips, and business scheduling guide.
Houston, Texas (CDT)
Monday, September 21, 2026
Sydney (GMT+10)
Tuesday, September 22, 2026
Houston to Sydney — Hour-by-Hour Conversion
| Houston (CDT) | Sydney (GMT+10) |
|---|---|
| 06:00 AM | 09:00 PM |
| 07:00 AM | 10:00 PM |
| 08:00 AM | 11:00 PM |
| 09:00 AM | 12:00 AM |
| 10:00 AM | 01:00 AM |
| 11:00 AM | 02:00 AM |
| 12:00 PM | 03:00 AM |
| 01:00 PM | 04:00 AM |
| 02:00 PM | 05:00 AM |
| 03:00 PM | 06:00 AM |
| 04:00 PM | 07:00 AM |
| 05:00 PM | 08:00 AM |
| 06:00 PM | 09:00 AM |
| 07:00 PM | 10:00 AM |
| 08:00 PM | 11:00 AM |
| 09:00 PM | 12:00 PM |
Highlighted rows = typical Houston business hours
Business Scheduling: Houston ↔ Sydney
The extreme time difference means most Houston-Sydney business happens asynchronously. The only practical real-time window is early morning Houston (6–8 AM CT) which catches late evening Sydney (9–11 PM AEST).
Travel Tips: Houston to Sydney
Houston to Sydney is one of the world's longest routes at 17+ hours. The date line crossing means you 'lose' a day going west and 'gain' one returning east.
Fun Facts
- Australia's DST runs October–April (opposite of Houston's March–November), causing the difference to shift
- When it's Monday 8 AM in Houston, it's already Tuesday 12 AM (midnight) in Sydney during AEDT
- Sydney was one of the first major cities to adopt time zones in 1895
About Houston and Sydney Time Zones
Sydney operates on Australian Eastern Standard Time (AEST) or Australian Eastern Daylight Time (AEDT). The time difference ranges from 15 to 17 hours ahead of Houston, making it one of the most challenging time zones for real-time coordination.