Lisbon to Naperville, IL: time difference
Naperville, IL is 6 h behind Lisbon. Live clocks for both, the working hours they share, and how each one sits against your own time.
Your time
One day, 2 clocks
Drag along the band to read any hour in every place at once.
Lisbon 23:17 11:17 PM Naperville, IL 17:17 5:17 PM You –:–
23:17 11:17 PM
Western European Summer Time · UTC+1
☀️ 07:51 · 🌙 18:53
17:17 5:17 PM
Central Daylight Time · UTC-5
☀️ 07:11 · 🌙 18:05
·
−6 h
Naperville, IL is 6 h behind Lisbon.
When you, Lisbon and Naperville, IL are all at the desk
Pick the working hours below – the window every location shares appears once your time zone is known.
Working hours
🇵🇹 Lisbon
0 12 AM 1 1 AM 2 2 AM 3 3 AM 4 4 AM 5 5 AM 6 6 AM 7 7 AM 8 8 AM 9 9 AM 10 10 AM 11 11 AM 12 12 PM 13 1 PM 14 2 PM 15 3 PM 16 4 PM 17 5 PM 18 6 PM 19 7 PM 20 8 PM 21 9 PM 22 10 PM 23 11 PM
🇺🇸 Naperville, IL
18 6 PM 19 7 PM 20 8 PM 21 9 PM 22 10 PM 23 11 PM 0 12 AM 1 1 AM 2 2 AM 3 3 AM 4 4 AM 5 5 AM 6 6 AM 7 7 AM 8 8 AM 9 9 AM 10 10 AM 11 11 AM 12 12 PM 13 1 PM 14 2 PM 15 3 PM 16 4 PM 17 5 PM
📍 Your time
- Asleep
- Early
- Working hours
- Evening
- Both working
- Right now
Time zones side by side
| Detail | 🇵🇹 Lisbon | 🇺🇸 Naperville, IL |
|---|---|---|
| Local time | 23:17 | 17:17 |
| Local date | Tuesday, October 20, 2026 | Tuesday, October 20, 2026 |
| Time zone | Western European Summer Time | Central Daylight Time |
| UTC offset | UTC+1 | UTC-5 |
| Offset from Lisbon | — | −6 h |
| IANA zone | Europe/Lisbon | America/Chicago |
| Daylight saving | On summer time → UTC+0, Oct 25, 01:00 | On summer time → UTC-6, Nov 1, 01:00 |
| Sunrise | 07:51 | 07:11 |
| Sunset | 18:53 | 18:05 |
| Daylight | 11 h 2 min | 10 h 54 min |
| People on this clock | 545,923 | 149,540 |
Compare Lisbon with another city
More comparisons with Lisbon: the time zones next to it and the far side of the clock.
Big time differences
Lisbon and Naperville, IL: common questions
How far behind Lisbon is Naperville, IL?
Naperville is 6 hours behind Lisbon: UTC−5 against UTC+1.
What time is it in Naperville, IL, at the start of the working day in Lisbon?
The working day in Lisbon starts at 9:00 AM; in Naperville it is 3:00 AM at that moment.
What time is it in Naperville, IL, when it is 6:00 PM in Lisbon?
When it is 6:00 PM in Lisbon, it is 12:00 PM in Naperville.
When do working hours in Lisbon and in Naperville, IL, overlap?
Working hours (9:00 AM–6:00 PM) overlap from 3:00 PM to 6:00 PM in Lisbon, which is 9:00 AM to 12:00 PM in Naperville.
When is it still the previous day in Naperville, IL?
Until 6:00 AM in Lisbon it is still the previous day in Naperville. The other way round, from 6:00 PM in Naperville it is already the next day in Lisbon.
Does the time difference between Lisbon and Naperville, IL, change?
Yes. Both places change their clocks, but on different dates. From October 25, 2026, Naperville will be 5 hours behind Lisbon.
