Sydney to San Antonio Time Difference
San Antonio is 16 hours behind Sydney. When it's 12:34:09 AM in Sydney, it's 08:34:09 AM in San Antonio.
How Many Hours Behind Is San Antonio From Sydney?
San Antonio is 16 hours behind Sydney. So Sydney is 16 hours ahead of San Antonio looking the other way — the same gap, described from the other end.
In practice that means a working day in Sydney starts when it is already 5:00 PM the previous day in San Antonio. The gap is not fixed all year: it becomes 17 hours on Sunday, November 1, 2026, when San Antonio changes its clocks.
Best Time to Call Sydney and San Antonio
Standard 9-to-5 hours in Sydney and San Antonio never overlap, so someone has to take the call outside their working day. The most workable window is 7:00 AM to 2:00 PM in Sydney, which is 3:00 PM to 10:00 PM in San Antonio.
both at work Sydney only San Antonio only neither — hours shown along the strip are Sydney local time.
Convert a Specific Time
Pick any date and time in Sydney to see the exact equivalent in San Antonio.
Common Times Converted
Sydney time on the left, San Antonio time on the right.
Sydney to San Antonio: Full 24-Hour Conversion Table
Based on today, Monday, October 12, 2026 in Sydney. Shaded rows are working hours; the darker shade marks the hours when both cities are at work.
| Sydney | San Antonio | Working hours |
|---|---|---|
| 12:00 AM | 8:00 AM prev day | — |
| 1:00 AM | 9:00 AM prev day | San Antonio only |
| 2:00 AM | 10:00 AM prev day | San Antonio only |
| 3:00 AM | 11:00 AM prev day | San Antonio only |
| 4:00 AM | 12:00 PM prev day | San Antonio only |
| 5:00 AM | 1:00 PM prev day | San Antonio only |
| 6:00 AM | 2:00 PM prev day | San Antonio only |
| 7:00 AM | 3:00 PM prev day | San Antonio only |
| 8:00 AM | 4:00 PM prev day | San Antonio only |
| 9:00 AM | 5:00 PM prev day | Sydney only |
| 10:00 AM | 6:00 PM prev day | Sydney only |
| 11:00 AM | 7:00 PM prev day | Sydney only |
| 12:00 PM | 8:00 PM prev day | Sydney only |
| 1:00 PM | 9:00 PM prev day | Sydney only |
| 2:00 PM | 10:00 PM prev day | Sydney only |
| 3:00 PM | 11:00 PM prev day | Sydney only |
| 4:00 PM | 12:00 AM | Sydney only |
| 5:00 PM | 1:00 AM | — |
| 6:00 PM | 2:00 AM | — |
| 7:00 PM | 3:00 AM | — |
| 8:00 PM | 4:00 AM | — |
| 9:00 PM | 5:00 AM | — |
| 10:00 PM | 6:00 AM | — |
| 11:00 PM | 7:00 AM | — |
Understanding the Sydney – San Antonio Time Difference
Sydney runs on Australia/Sydney, currently AEDT (UTC+11:00). San Antonio runs on America/Chicago, currently CDT (UTC-5:00). The gap of 16 hours is simply the distance between those two offsets.
Both cities observe Daylight Saving Time, but they don't switch on the same date — so for a few weeks each year the gap between them is different again. The next shift is on Sunday, November 1, 2026, when San Antonio adjusts its clocks and the difference becomes 17 hours. Anything scheduled across that date needs checking again.
Full clock-change dates: Daylight Saving Time in Australia · Daylight Saving Time in the United States.
Sydney today
San Antonio today
Frequently Asked Questions
What is the time difference between Sydney and San Antonio?
San Antonio is currently 16 hours behind Sydney. That gap becomes 17 hours on Sunday, November 1, 2026, when San Antonio changes its clocks.
How many hours behind is San Antonio from Sydney?
San Antonio is 16 hours behind Sydney. Looking at it the other way, Sydney is 16 hours ahead of San Antonio.
What time is it in San Antonio when it is 9:00 AM in Sydney?
When it is 9:00 AM in Sydney, it is 5:00 PM the previous day in San Antonio.
Is San Antonio ahead of or behind Sydney?
San Antonio is 16 hours behind Sydney. Sydney reaches each point in the day first, so San Antonio is still getting started while the Sydney working day is finishing.
What is the best time to call between Sydney and San Antonio?
Standard business hours in Sydney and San Antonio do not overlap at all, so one side has to step outside the 9-to-5. The most workable window is 7:00 AM to 2:00 PM in Sydney, which is 3:00 PM to 10:00 PM in San Antonio.
Does the time difference between Sydney and San Antonio change during the year?
Yes. Both cities observe Daylight Saving Time, and they do not always switch on the same date, so the gap between them shifts during the year. It changes to 17 hours on Sunday, November 1, 2026.
What time zones are Sydney and San Antonio in?
Sydney uses the Australia/Sydney time zone, currently AEDT (UTC+11:00). San Antonio uses America/Chicago, currently CDT (UTC-5:00).