New York → Chicago
10am EST to CST
The answer
10am EST is 09:00 in Chicago, same day.
This one is stable all year: Chicago is 1 hour behind of New York in every month, because both sides change their clocks together (or neither does).
Both halves of the year
| Period | New York | Chicago | Day |
|---|---|---|---|
| Summer | 10:00 | 09:00 | same day |
| Winter | 10:00 | 09:00 | same day |
Daylight saving state
In summer, New York is on daylight saving time and Chicago is on daylight saving time. Because the two sides shift together, the gap between them never changes — only the labels do.
The hours either side
| New York | Chicago (summer) | Chicago (winter) |
|---|---|---|
| 8am | 07:00 | 07:00 |
| 9am | 08:00 | 08:00 |
| 10am | 09:00 | 09:00 |
| 11am | 10:00 | 10:00 |
| 12pm | 11:00 | 11:00 |
Going the other way
Chicago runs 1 hour behind of New York, so to go back you reverse it. If you are writing this down for someone else, name the cities rather than the abbreviations — “EST” and “CST” are only correct for part of the year, and some abbreviations mean different things in different countries. See EST vs EDT.
Timezone: World Clock Widget
A world clock, converter and live day/night map for iPhone — 325 cities, offline, no account.
Computed from the IANA time zone database. Last generated 2026-08-18.