What is the time difference between Chicago and Lisbon?

Lisbon is 6 hours ahead of Chicago. That figure is current — it changes by an hour when either city starts or ends daylight saving, and the exact dates are listed above.

When is the best time to call Lisbon from Chicago?

Between 09:00–12:00 in Chicago, which is 15:00–18:00 in Lisbon. That is the only stretch where both cities are inside a 09:00–18:00 day.

Does Chicago observe daylight saving time?

Yes. Chicago runs on UTC-6 in winter and UTC-5 in summer. The next change is on 2026-11-01, when clocks go back by 60 minutes.

Does Lisbon observe daylight saving time?

Yes. Lisbon runs on UTC+0 in winter and UTC+1 in summer. The next change is on 2026-10-25, when clocks go back by 60 minutes.

If it is midday in Chicago, what time is it in Lisbon?

It is 18:00 in Lisbon, on the same calendar date. That holds for the current offsets; it shifts by an hour around the daylight saving dates listed above.

Which time zones do Chicago and Lisbon use?

Chicago uses America/Chicago, currently UTC-5 (CDT), and Lisbon uses Europe/Lisbon, currently UTC+1 (WEST). Those identifiers are the ones to use in code — abbreviations are ambiguous and offsets change.

Convert Chicago time to Lisbon time

Lisbon is 6 hours ahead of Chicago right now, so midday in Chicago lands in the evening in Lisbon.

Convert a time

From

Date

Time

Converted time

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The converter needs JavaScript to run. Everything below — offsets, daylight saving dates and the hour-by-hour table — is part of the page and works without it.

Hour by hour

Every hour of a day in Chicago, and what the clock reads in Lisbon at that same moment.

Chicago	Lisbon
00:00	06:00
01:00	07:00
02:00	08:00
03:00	09:00
04:00	10:00
05:00	11:00
06:00	12:00
07:00	13:00
08:00	14:00
09:00	15:00
10:00	16:00
11:00	17:00
12:00	18:00
13:00	19:00
14:00	20:00
15:00	21:00
16:00	22:00
17:00	23:00
18:00	00:00next day
19:00	01:00next day
20:00	02:00next day
21:00	03:00next day
22:00	04:00next day
23:00	05:00next day

Daylight saving time

Both cities change their clocks, but not necessarily on the same date — which is why the difference between them shifts for a few weeks each year.

Chicago

Observes daylight saving time

Standard: UTC-6
Daylight: UTC-5
Next change: 2026-11-01 −60m

Lisbon

Observes daylight saving time

Standard: UTC+0
Daylight: UTC+1
Next change: 2026-10-25 −60m

When you can actually talk

The window is 3 hours wide — 09:00–12:00 in Chicago, 15:00–18:00 in Lisbon.

Chicago 09:00–12:00Lisbon 15:00–18:00

Reference

The zone identifiers and offsets behind everything above.

	Chicago	Lisbon
IANA zone	America/Chicago	Europe/Lisbon
Abbreviation	CDT	WEST
Standard offset	UTC-6	UTC+0
Daylight offset	UTC-5	UTC+1
Clock changes this year	2	2
Country	United States	Portugal

Example, not the current time. Live times appear once the page loads.

Common questions

What is the time difference between Chicago and Lisbon?: Lisbon is 6 hours ahead of Chicago. That figure is current — it changes by an hour when either city starts or ends daylight saving, and the exact dates are listed above.
When is the best time to call Lisbon from Chicago?: Between 09:00–12:00 in Chicago, which is 15:00–18:00 in Lisbon. That is the only stretch where both cities are inside a 09:00–18:00 day.
Does Chicago observe daylight saving time?: Yes. Chicago runs on UTC-6 in winter and UTC-5 in summer. The next change is on 2026-11-01, when clocks go back by 60 minutes.
Does Lisbon observe daylight saving time?: Yes. Lisbon runs on UTC+0 in winter and UTC+1 in summer. The next change is on 2026-10-25, when clocks go back by 60 minutes.
If it is midday in Chicago, what time is it in Lisbon?: It is 18:00 in Lisbon, on the same calendar date. That holds for the current offsets; it shifts by an hour around the daylight saving dates listed above.
Which time zones do Chicago and Lisbon use?: Chicago uses America/Chicago, currently UTC-5 (CDT), and Lisbon uses Europe/Lisbon, currently UTC+1 (WEST). Those identifiers are the ones to use in code — abbreviations are ambiguous and offsets change.