CST to AEST converter: Central time to Sydney time

In 2026 Sydney is 17 hours ahead of Chicago until 8 March, 16 hours ahead from 8 March to 5 April, 15 hours ahead from 5 April to 4 October, 16 hours ahead from 4 October to 1 November and 17 hours ahead for the rest of the year, as the US and Australia change their clocks on different dates.

Chicago12:00 PMSunday 11 Oct · CDT

Sydney4:00 AMMonday 12 Oct · AEDT

Sydney is 16 h ahead Chicago today.

Chicago

01234567891011121314151617181920212223

Sydney

16171819202122230123456789101112131415

9 to 6 working hoursboth at workOverlap: 5 PM–6 PM in Chicago

Your result

Enter your values to see the result.

Daylight saving: local time and fixed CST and AEST

The converter starts with Chicago to Sydney, using local clock rules. For the standard-time offsets all year, use the fixed CST and AEST button.

These examples use noon on the dates shown. A converted date can be the previous or following day.

Starting date and time	Using local city rules	Using fixed CST and AEST
2026-01-15 12:00	2026-01-16 05:00 (UTC+11:00)	2026-01-16 04:00
2026-07-15 12:00	2026-07-16 03:00 (UTC+10:00)	2026-07-16 04:00

12:00 PM Wednesday 15 Jul in Chicago is 3:00 AM Thursday 16 Jul in Sydney (AEST, 15 h ahead).

Why daylight saving conversions need a date explains skipped and repeated clock readings. The rules here come from the browser’s time zone data and can lag a government change.