Chicago
United States
--:-- --
CST · UTC-6 15 hours 30 minutes difference
Adelaide
Australia
--:-- --
GMT+10:30 · UTC+9:30 Convert Chicago (CST) to Adelaide (GMT+10:30) Time — 15 hours 30 minutes apart
America/Chicago · CST · UTC-6 | Australia/Adelaide · GMT+10:30 · UTC+9:30 · 15 hours 30 minutes difference · 251 cities · DST applies
24-Hour Overlap Timeline
❌ No business-hours overlap between Chicago and Adelaide (9–18 local)
⚠ Chicago and Adelaide observe daylight saving time — offset may vary by up to 1 hour seasonally
| 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UTC → | ||||||||||||||||||||||||
| 🇺🇸 Chicago UTC-6 | 6p | 7p | 8p | 9p | 10p | 11p | 12a | 1a | 2a | 3a | 4a | 5a | 6a | 7a | 8a | 9a | 10a | 11a | 12p | 1p | 2p | 3p | 4p | 5p |
| 🇦🇺 Adelaide UTC+9:30 | 9a | 10a | 11a | 12p | 1p | 2p | 3p | 4p | 5p | 6p | 7p | 8p | 9p | 10p | 11p | 12a | 1a | 2a | 3a | 4a | 5a | 6a | 7a | 8a |
Both working Working Off hours Sleeping Now
Key Facts: Chicago (CST) vs Adelaide (GMT+10:30)
Time Gap
15h 30m
Adelaide ahead
May vary ±1h (DST)
DST Status
⏰ Chicago
Observes DST
⏰ Adelaide: Observes DST
Cities in CST
250
Largest: Chicago
8,489,066 pop.
Overlap Window
None
No work-hour overlap
Consider early/late meetings
Find Cities in Chicago & Adelaide Timezones
The CST and GMT+10:30 timezones are separated by 15 hours 30 minutes. Chicago is the largest city in the America/Chicago zone and Adelaide is the largest in Australia/Adelaide. Chicago observes daylight saving time — the difference may change by 1 hour seasonally. For scheduling between these regions, the key fact is: there is no comfortable overlap during standard business hours.
Best Times to Schedule Calls: Chicago (CST) ↔ Adelaide (GMT+10:30)
| Chicago (CST) | Adelaide (GMT+10:30) | Quality |
|---|---|---|
| 12:00 AM | 3:00 PM | ❌ |
| 1:00 AM | 4:00 PM | ❌ |
| 2:00 AM | 5:00 PM | ❌ |
| 3:00 AM | 6:00 PM | ❌ |
| 4:00 AM | 7:00 PM | ❌ |
| 5:00 AM | 8:00 PM | ❌ |
| 6:00 AM | 9:00 PM | ❌ |
| 7:00 AM | 10:00 PM | ❌ |
| 8:00 AM | 11:00 PM | ❌ |
| 9:00 AM | 12:00 AM +1 day | ❌ |
| 10:00 AM | 1:00 AM +1 day | ❌ |
| 11:00 AM | 2:00 AM +1 day | ❌ |
| 12:00 PM | 3:00 AM +1 day | ❌ |
| 1:00 PM | 4:00 AM +1 day | ❌ |
| 2:00 PM | 5:00 AM +1 day | ❌ |
| 3:00 PM | 6:00 AM +1 day | ❌ |
| 4:00 PM | 7:00 AM +1 day | ⚠️ |
| 5:00 PM | 8:00 AM +1 day | ⚠️ |
| 6:00 PM | 9:00 AM +1 day | ⚠️ |
| 7:00 PM | 10:00 AM +1 day | ⚠️ |
| 8:00 PM | 11:00 AM +1 day | ❌ |
| 9:00 PM | 12:00 PM +1 day | ❌ |
| 10:00 PM | 1:00 PM +1 day | ❌ |
| 11:00 PM | 2:00 PM +1 day | ❌ |
Work hours defined as 09:00–18:00 local time. ✅ Both in work hours ⚠️ Borderline ❌ Outside work hours.
CST to GMT+10:30: Complete 24-Hour Time Conversion Table
| Chicago (CST) | Adelaide (GMT+10:30) | IST (UTC+5:30) |
|---|---|---|
| 12:00 AM | 3:30 PM | 11:30 AM |
| 1:00 AM | 4:30 PM | 12:30 PM |
| 2:00 AM | 5:30 PM | 1:30 PM |
| 3:00 AM | 6:30 PM | 2:30 PM |
| 4:00 AM | 7:30 PM | 3:30 PM |
| 5:00 AM | 8:30 PM | 4:30 PM |
| 6:00 AM | 9:30 PM | 5:30 PM |
| 7:00 AM | 10:30 PM | 6:30 PM |
| 8:00 AM | 11:30 PM | 7:30 PM |
| ← Date changes in Adelaide → | ||
| 9:00 AM | 12:30 AM +1 | 8:30 PM |
| 10:00 AM | 1:30 AM +1 | 9:30 PM |
| 11:00 AM | 2:30 AM +1 | 10:30 PM |
| 12:00 PM | 3:30 AM +1 | 11:30 PM |
| 1:00 PM | 4:30 AM +1 | 12:30 AM |
| 2:00 PM | 5:30 AM +1 | 1:30 AM |
| 3:00 PM | 6:30 AM +1 | 2:30 AM |
| 4:00 PM | 7:30 AM +1 | 3:30 AM |
| 5:00 PM | 8:30 AM +1 | 4:30 AM |
| 6:00 PM | 9:30 AM +1 | 5:30 AM |
| 7:00 PM | 10:30 AM +1 | 6:30 AM |
| 8:00 PM | 11:30 AM +1 | 7:30 AM |
| 9:00 PM | 12:30 PM +1 | 8:30 AM |
| 10:00 PM | 1:30 PM +1 | 9:30 AM |
| 11:00 PM | 2:30 PM +1 | 10:30 AM |
IST (India Standard Time, UTC+5:30) shown as reference for Indian users. +1/−1 indicates a different calendar day.
250 Cities in Chicago (CST) & 1 Cities in Adelaide (GMT+10:30) — Page 1 of 2
Chicago & 249 more — Chicago (CST, UTC-6)
- Chicago, US 8.5M
- Houston, US 6.0M
- Dallas, US 5.8M
- Minneapolis, US 2.9M
- St. Louis, US 2.1M
- San Antonio, US 2.1M
- Austin, US 1.9M
- Kansas City, US 1.7M
- Milwaukee, US 1.3M
- Nashville, US 1.2M
- Memphis, US 1.0M
- Oklahoma City, US 1.0M
- Fort Worth, US 941K
- New Orleans, US 919K
- Omaha, US 826K
McAllen, USBirmingham, USWinnipeg, CATulsa, USBaton Rouge, USReynosa, MXDes Moines, USHeroica Matamoros, MXWichita, USLittle Rock, USMadison, USDenton, USFayetteville, USPensacola, USArlington, USNuevo Laredo, MXHuntsville, USCorpus Christi, USJackson, USMobile, USSt. Paul, USLincoln, USSpringfield, USPlano, USLubbock, USDavenport, USShreveport, USRockford, USPeoria, USKilleen, USLaredo, USIrving, USRound Lake Beach, USMontgomery, USGarland, USAppleton, USGulfport, USLafayette, USGreen Bay, USFargo, USBrownsville, USClarksville, USCollege Station, USFrisco, USSioux Falls, USEvansville, USAmarillo, USGalveston, USMcKinney, USGrand Prairie, USWaco, USOverland Park, USCedar Rapids, USMurfreesboro, USAurora, USPanama City, USPiedras Negras, MXTuscaloosa, USOdessa, USCiudad Acuna, MXTopeka, USJoliet, USNaperville, USPasadena, USMesquite, USChampaign, USHouma, USBeaumont, USLake Charles, USOlathe, USMidland, USColumbia, USMetairie, USRacine, USBloomington, USCarrollton, USTyler, USIowa City, USNorman, USFort Smith, USLewisville, USAbilene, USPearland, USKenosha, USRound Rock, USTemple, USRochester, USIndependence, USDuluth, USRichardson, USMonroe, USThe Woodlands, USSt. Cloud, USBroken Arrow, USHarlingen, USMandeville, USLeague City, USPort Arthur, USElgin, USWaterloo, USSioux City, USLongview, USSugar Land, USEau Claire, USAuburn, USAllen, USLee's Summit, USEdinburg, USWichita Falls, USBowling Green, USCiudad Rio Bravo, MXSan Angelo, USBismarck, USNew Braunfels, USConroe, USLawrence, USEdmond, USSlidell, USAtascocita, USLa Crosse, USO'Fallon, USHoover, USLawton, USWaukegan, USJoplin, USSpringdale, USMission, USBryan, USFranklin, USDecatur, USBaytown, USBrooklyn Park, USCicero, USHattiesburg, USOwensboro, USFlorence, USPharr, USPlymouth, USJonesboro, USGeorgetown, USTexarkana, USFlower Mound, USAlton, USCedar Park, USHammond, USWoodbury, USSchaumburg, USEvanston, USSt. Joseph, USWausau, USAnniston, USArlington Heights, USOshkosh, USMansfield, USMissouri City, USJanesville, USSan Marcos, USDothan, USSherman, USBolingbrook, USAlexandria, USSheboygan, USLakeville, USRogers, USBlaine, USSt. Charles, USWaukesha, USAnkeny, USMaple Grove, USNorth Richland Hills, USConway, USWest Des Moines, USSpring Hill, USGrand Forks, USMichigan City, USGary, USValle Hermoso, MXDubuque, USShawnee, USEagan, USKankakee, USLeander, USSpring, USPalatine, USVictoria, US
Adelaide & cities — Adelaide (GMT+10:30, UTC+9:30)
- Adelaide, AU 1.4M
⚠️ Daylight Saving Time Affects This Pair
| Timezone | DST? | Standard | Daylight |
|---|---|---|---|
| America/Chicago | Yes | UTC-6 | UTC-5 |
| Australia/Adelaide | Yes | UTC+9:30 | UTC+10.5 |
During DST periods the time difference between these zones may be 15 hours 30 minutes instead of 15 hours 30 minutes. Always verify the current offset if scheduling calls near clock-change dates.