Lisbon to Alton, IL: time difference
Alton, 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 00:26 12:26 AM Alton, IL 18:26 6:26 PM You –:–
00:26 12:26 AM
Western European Summer Time · UTC+1
☀️ 07:51 · 🌙 18:53
18:26 6:26 PM
Central Daylight Time · UTC-5
☀️ 07:16 · 🌙 18:17
·
−6 h
Alton, IL is 6 h behind Lisbon.
When you, Lisbon and Alton, 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
🇺🇸 Alton, 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 | 🇺🇸 Alton, IL |
|---|---|---|
| Local time | 00:26 | 18:26 |
| Local date | Wednesday, October 21, 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 | 07:16 |
| Sunset | 18:53 | 18:17 |
| Daylight | 11 h 2 min | 11 h 1 min |
| People on this clock | 545,923 | 25,676 |
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 Alton, IL: common questions
How many hours behind Lisbon is Alton, IL?
The clocks in Alton are 6 hours behind those in Lisbon (UTC−5 and UTC+1).
What time is it in Alton, IL, when it is 9:00 AM in Lisbon?
When it is 9:00 AM in Lisbon, it is 3:00 AM in Alton.
What time is it in Alton, IL, when it is 6:00 PM in Lisbon?
When it is 6:00 PM in Lisbon, it is 12:00 PM in Alton.
When do working hours in Lisbon and in Alton, 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 Alton.
When does the date change in Alton, IL, compared with Lisbon?
The new day starts in Alton later: until 6:00 AM in Lisbon, it is still the previous day there. From 6:00 PM in Alton, Lisbon is already on the next day.
Is the time difference between Lisbon and Alton, IL, the same all year?
No. Both places use summer time, but they switch on different dates, so for a while the gap changes. From October 25, 2026, Alton will be 5 hours behind Lisbon.
