Chicago is always one hour behind New York. In January, when both cities run on standard time, noon in Washington means 11:00 in Chicago. In July, when both switch to summer time, the gap holds: noon Eastern, 11:00 Central. The relationship never budges.
The only number you need: subtract 1
Eastern Time (whether EST or EDT) sits one hour ahead of Central Time (CST or CDT). That is the entire conversion. No half-hours, no seasonal drift, no exceptions. If it is 2:00 PM in Washington, it is 1:00 PM in Chicago. If it is 9:30 AM in New York, it is 8:30 AM in Dallas.
The names change. The arithmetic does not.
Winter names, summer names, same gap
Most Americans say "EST" all year. That is the single most common time zone mistake in the country. EST and CST are standard time labels, used only during the colder months. From the second Sunday in March to the first Sunday in November, the zones are called EDT and CDT.
- Winter (standard time): EST (UTC−5) and CST (UTC−6). Difference: 1 hour.
- Summer (daylight time): EDT (UTC−4) and CDT (UTC−5). Difference: still 1 hour.
On 15 January 2026, Washington (EST) is 1 hour ahead of Chicago (CST). On 15 July 2026, Washington (EDT) is 1 hour ahead of Chicago (CDT). The offset is identical. What shifts is each zone’s distance from UTC, and both shift together.
When the clocks move, they move together
The transition hits both zones at the same instant. On Sunday 8 March 2026 at 02:00 Eastern, clocks spring forward to 03:00. In the Central zone, it is 01:00 when the change triggers. Both zones advance 60 minutes simultaneously. Nobody falls out of sync.
The fall change works the same way. On Sunday 1 November 2026 at 02:00 Eastern, clocks drop back to 01:00. Central does the same, one hour behind on the clock face but at the exact same moment. The 1-hour gap survives untouched.
Quick conversions
- 9:00 AM Eastern → 8:00 AM Central
- 12:00 PM Eastern → 11:00 AM Central
- 3:30 PM Eastern → 2:30 PM Central
- 6:00 PM Eastern → 5:00 PM Central
- 11:59 PM Eastern → 10:59 PM Central
| Eastern Time | Central Time |
|---|---|
| 8:00 AM | 7:00 AM |
| 9:00 AM | 8:00 AM |
| 10:00 AM | 9:00 AM |
| 11:00 AM | 10:00 AM |
| 12:00 PM | 11:00 AM |
| 1:00 PM | 12:00 PM |
| 2:00 PM | 1:00 PM |
| 3:00 PM | 2:00 PM |
| 4:00 PM | 3:00 PM |
| 5:00 PM | 4:00 PM |
| 6:00 PM | 5:00 PM |
| 7:00 PM | 6:00 PM |
Scheduling across the divide
A 9:00 AM Eastern meeting lands at 8:00 AM Central. That is early but workable. Push it to 10:00 AM Eastern (9:00 AM Central) and you dodge the early-morning friction for Chicago, Dallas, and Nashville without punishing the East Coast.
Broadcasters live by this gap. "8/7 Central" means a show airs at 8:00 PM Eastern and 7:00 PM Central. Live events like the Super Bowl typically start around 6:30 PM Eastern so West Coast viewers are not eating dinner during the kickoff.
Financial markets run on Eastern Time. The New York Stock Exchange opens at 9:30 AM Eastern. That is 8:30 AM Central. Traders in Chicago start their day an hour earlier by the clock, but the market bell rings at the same instant for everyone.
States split between Eastern and Central
Do not assume a state is one zone. Indiana, Kentucky, Tennessee, and Florida all have both Eastern and Central counties. The boundary cuts through each state. A call to a business in Pensacola (Central) is an hour different from a call to one in Jacksonville (Eastern). Check the city, not the state.
The United States runs on 29 IANA time zones across its full territory. The contiguous 48 states use four main zones: Eastern, Central, Mountain, and Pacific. Arizona stays on Mountain Standard Time year-round. Hawaii stays on Hawaii Standard Time. Neither observes summer time.