CDT to Sydney time conversion
Sydney is 16 hours ahead of CDT. After the next clock change (): Sydney is 15 hours ahead of CDT.
Time difference with your location
CDT is 5 hours behind UTC. Compare with your local time →
Choose a date and time
Choose the local time in CDT to convert it to Sydney on that date.
Skipped clock-change times are unavailable; a repeated time uses its first occurrence.
24-hour conversion chart · CDT → Sydney
This table converts each hour in CDT to Sydney on 2026-10-21.
- Working hours
- Outside working hours
- Night hours
| CDT | Sydney | Shared working hours |
|---|---|---|
| 00:0012:00 AM | 16:004:00 PM | |
| 01:001:00 AM | 17:005:00 PM | |
| 02:002:00 AM | 18:006:00 PM | |
| 03:003:00 AM | 19:007:00 PM | |
| 04:004:00 AM | 20:008:00 PM | |
| 05:005:00 AM | 21:009:00 PM | |
| 06:006:00 AM | 22:0010:00 PM | |
| 07:007:00 AM | 23:0011:00 PM | |
| 08:008:00 AM | 00:0012:00 AM +1 day | |
| 09:009:00 AM | 01:001:00 AM +1 day | |
| 10:0010:00 AM | 02:002:00 AM +1 day | |
| 11:0011:00 AM | 03:003:00 AM +1 day | |
| 12:0012:00 PM | 04:004:00 AM +1 day | |
| 13:001:00 PM | 05:005:00 AM +1 day | |
| 14:002:00 PM | 06:006:00 AM +1 day | |
| 15:003:00 PM | 07:007:00 AM +1 day | |
| 16:004:00 PM | 08:008:00 AM +1 day | ✓ |
| 17:005:00 PM | 09:009:00 AM +1 day | ✓ |
| 18:006:00 PM | 10:0010:00 AM +1 day | |
| 19:007:00 PM | 11:0011:00 AM +1 day | |
| 20:008:00 PM | 12:0012:00 PM +1 day | |
| 21:009:00 PM | 13:001:00 PM +1 day | |
| 22:0010:00 PM | 14:002:00 PM +1 day | |
| 23:0011:00 PM | 15:003:00 PM +1 day |
Quick conversion examples
These examples use CDT (UTC-5) and Sydney (UTC+11); choosing a date applies the local clock changes.
Conversion formula: Sydney = CDT + 16h · CST + 17h · CDT + 15h.
| CDT | Sydney |
|---|---|
| 6:00 AM CDT | = 10:00 PM Sydney |
| 7:00 AM CDT | = 11:00 PM Sydney |
| 8:00 AM CDT | = 12:00 AM Sydney (+1 day) |
| 9:00 AM CDT | = 1:00 AM Sydney (+1 day) |
| 10:00 AM CDT | = 2:00 AM Sydney (+1 day) |
| 12:00 PM CDT | = 4:00 AM Sydney (+1 day) |
| 3:00 PM CDT | = 7:00 AM Sydney (+1 day) |
| 5:00 PM CDT | = 9:00 AM Sydney (+1 day) |
| 6:00 PM CDT | = 10:00 AM Sydney (+1 day) |
| 8:00 PM CDT | = 12:00 PM Sydney (+1 day) |
Overlapping meeting hours
The 08:00–18:00 working day in CDT and Sydney overlaps for 2 hours on 2026-10-21.
- Shared working hours
- 16:00–18:00 CDT · 08:00–10:00 Sydney
Clock changes on both sides, 2026–2028
CDT and Sydney have the following local clock changes in 2026–2028; all times in the table are local to that side.
| Year | CDT | Sydney |
|---|---|---|
| 2026 | · 02:00 → 03:00 · 02:00 → 01:00 | · 03:00 → 02:00 · 02:00 → 03:00 |
| 2027 | · 02:00 → 03:00 · 02:00 → 01:00 | · 03:00 → 02:00 · 02:00 → 03:00 |
| 2028 | · 02:00 → 03:00 · 02:00 → 01:00 | · 03:00 → 02:00 · 02:00 → 03:00 |
At the start of 2026, Sydney is 17 hours ahead of CST. The difference changes during the following periods.
- From 2026-03-08 03:00 CDT until 2026-04-04 11:00 CDT, Sydney is 16 hours ahead of CDT.
- From 2026-04-04 11:00 CDT until 2026-10-03 11:00 CDT, Sydney is 15 hours ahead of CDT.
- From 2026-10-03 11:00 CDT until 2026-11-01 01:00 CST, Sydney is 16 hours ahead of CDT.
- From 2027-03-14 03:00 CDT until 2027-04-03 11:00 CDT, Sydney is 16 hours ahead of CDT.
- From 2027-04-03 11:00 CDT until 2027-10-02 11:00 CDT, Sydney is 15 hours ahead of CDT.
- From 2027-10-02 11:00 CDT until 2027-11-07 01:00 CST, Sydney is 16 hours ahead of CDT.
- From 2028-03-12 03:00 CDT until 2028-04-01 11:00 CDT, Sydney is 16 hours ahead of CDT.
- From 2028-04-01 11:00 CDT until 2028-09-30 11:00 CDT, Sydney is 15 hours ahead of CDT.
- From 2028-09-30 11:00 CDT until 2028-11-05 01:00 CST, Sydney is 16 hours ahead of CDT.
Frequently asked questions
What time is 9 AM CDT in Sydney?
9:00 AM CDT = 1:00 AM Sydney (+1 day), using UTC-5 and UTC+11. Choose a date above for the seasonal local time.
Does the time difference between CDT and Sydney change during the year?
Yes. During 2026–2028: Sydney is 15 hours ahead of CDT; Sydney is 16 hours ahead of CDT; Sydney is 17 hours ahead of CDT. The clock-change table gives the dates for both sides.
How do I tell whether it is day or night in Sydney?
Read the Sydney clock above: this guide counts 06:00–18:00 local time as daytime and the rest as nighttime, without using sunrise and sunset.
What is the best time to call between CDT and Sydney?
The shared 08:00–18:00 working window is 16:00–18:00 UTC-5 / 08:00–10:00 Sydney, a total of 2 hours.
What is the time difference between CDT and Sydney now?
Right now, Sydney is 16 hours ahead of UTC-5. Conversion formula: Sydney = CDT + 16h · CST + 17h · CDT + 15h.