Live offset · Year-round DST · Shareable URL

Time difference
Chicago and Buenos Aires

Live clocks (CST ↔ ART), the current gap, month-by-month offset changes, and a full 24-hour map from Chicago to Buenos Aires.

1

Live gap

See the current offset between Chicago and Buenos Aires, with IANA-backed clocks updating every second.

2

Year-round chart

DST can shift the gap by an hour twice a year—the 2026 month table shows every change.

3

Hour-by-hour

Scroll the 24-hour table to map any civil hour in Chicago into Buenos Aires with day-shift cues.

Time difference workspace

How Chicago and Buenos Aires line up today.

2 cities · live offsetGap shifts yearly
City pair

Chicago Buenos Aires

Buenos Aires is 2h ahead of Chicago at this moment. Compare live clocks, seasonal DST shifts, and hour-by-hour conversions below.

Live offsetIANA zones · updates automatically
Chicago
America/Chicago
ZoneCST / CDT
Offset nowUTC-5
Hour gap
+2h

Buenos AiresChicago

Buenos Aires
America/Argentina/Buenos_Aires
ZoneART
Offset nowUTC-3
About this pairUseful when planning calls or docs

Time difference between Chicago and Buenos Aires: Buenos Aires is currently 3 hours ahead of Chicago.

This difference is not constant: in winter Chicago is 3 hours behind Buenos Aires, while in summer (when one or both observe DST) the gap shifts to 2 hours behind. The monthly table below shows the exact offset gap month by month. For practical scheduling, jump to the best-time-to-meet page or the 24-hour conversion table below.

Jump aheadPick the view you need next
Best time to meetMonthly offsets24-hour table
Live clocks workspace

Clocks side by side.

Updates every second
Right nowAmerica/Chicago · America/Argentina/Buenos_Aires
Chicago
America/Chicago
Live time
--:--
OffsetUTC-5
AbbreviationCST / CDT
Observes DST
Buenos Aires
America/Argentina/Buenos_Aires
Live time
--:--
OffsetUTC-3
AbbreviationART
No DST
Relationship

Buenos Aires is 2h ahead of Chicago.

DST rules can widen or shrink this gap for a few weeks each spring and autumn—the month table below shows how many hours Buenos Aires sits ahead of or behind Chicago through the calendar year.

Next stepsPlan overlap or convert zones
Best time to meet →CST → ART →Overlap Finder →
Year-round

Offset changes by month

Sampled mid-month for 2026. Compares Buenos Aires versus Chicago; a value of +3h means Buenos Aires is three hours ahead of Chicago.

2026 calendar

Month-by-month gap

MonthDifference (Buenos Aires vs Chicago)
January+3h
February+3h
March+2h
April+2h
May+2h
June+2h
July+2h
August+2h
September+2h
October+2h
November+3h
December+3h
Hour by hour

24-hour conversion table

Every civil hour in Chicago mapped into Buenos Aires; day-shift cues follow active DST for both zones today.

ChicagoBuenos Aires

Hourly wall-clock map for today — midnight crossings show as day shifts.

Chicago with part-of-day icon
Buenos Aires arrow and converted time
Day
  • 00:00
    02:00
    Same day
  • 01:00
    03:00
    Same day
  • 02:00
    04:00
    Same day
  • 03:00
    05:00
    Same day
  • 04:00
    06:00
    Same day
  • 05:00
    07:00
    Same day
  • 06:00
    08:00
    Same day
  • 07:00
    09:00
    Same day
  • 08:00
    10:00
    Same day
  • 09:00
    11:00
    Same day
  • 10:00
    12:00
    Same day
  • 11:00
    13:00
    Same day
  • 12:00
    14:00
    Same day
  • 13:00
    15:00
    Same day
  • 14:00
    16:00
    Same day
  • 15:00
    17:00
    Same day
  • 16:00
    18:00
    Same day
  • 17:00
    19:00
    Same day
  • 18:00
    20:00
    Same day
  • 19:00
    21:00
    Same day
  • 20:00
    22:00
    Same day
  • 21:00
    23:00
    Same day
  • 22:00
    00:00
    Next day
  • 23:00
    01:00
    Next day
Uses your browser's IANA zone data — choose another date in the converter for historical or future days.
Keep exploring

Related pages

More time-difference routes, pairwise best times, triple-city overlaps, and conversions tied to Chicago, Buenos Aires, or this corridor.

FAQ

Frequently asked questions

Offsets between Chicago and Buenos Aires, DST shifts, scheduling, and how we source timezone data—plus how to share this page.

Currently, Buenos Aires is 2h ahead of Chicago. This may change through the year if either city observes Daylight Saving Time.