Lisbon to Boston Time Difference
Boston is 5 hours behind Lisbon. When it's 02:34:14 PM in Lisbon, it's 09:34:14 AM in Boston.
How Many Hours Behind Is Boston From Lisbon?
Boston is 5 hours behind Lisbon. So Lisbon is 5 hours ahead of Boston looking the other way — the same gap, described from the other end.
In practice that means a working day in Lisbon starts when it is already 4:00 AM in Boston. The gap is not fixed all year: it becomes 4 hours on Sunday, October 25, 2026, when Lisbon changes its clocks.
Best Time to Call Lisbon and Boston
Both cities are inside normal business hours between 2:00 PM and 5:00 PM in Lisbon — that's 9:00 AM to 12:00 PM in Boston. That's a 3-hour window, so a call fits comfortably in either side's working day.
both at work Lisbon only Boston only neither — hours shown along the strip are Lisbon local time.
Convert a Specific Time
Pick any date and time in Lisbon to see the exact equivalent in Boston.
Common Times Converted
Lisbon time on the left, Boston time on the right.
Lisbon to Boston: Full 24-Hour Conversion Table
Based on today, Sunday, October 11, 2026 in Lisbon. Shaded rows are working hours; the darker shade marks the hours when both cities are at work.
| Lisbon | Boston | Working hours |
|---|---|---|
| 12:00 AM | 7:00 PM prev day | — |
| 1:00 AM | 8:00 PM prev day | — |
| 2:00 AM | 9:00 PM prev day | — |
| 3:00 AM | 10:00 PM prev day | — |
| 4:00 AM | 11:00 PM prev day | — |
| 5:00 AM | 12:00 AM | — |
| 6:00 AM | 1:00 AM | — |
| 7:00 AM | 2:00 AM | — |
| 8:00 AM | 3:00 AM | — |
| 9:00 AM | 4:00 AM | Lisbon only |
| 10:00 AM | 5:00 AM | Lisbon only |
| 11:00 AM | 6:00 AM | Lisbon only |
| 12:00 PM | 7:00 AM | Lisbon only |
| 1:00 PM | 8:00 AM | Lisbon only |
| 2:00 PM | 9:00 AM | Both cities |
| 3:00 PM | 10:00 AM | Both cities |
| 4:00 PM | 11:00 AM | Both cities |
| 5:00 PM | 12:00 PM | Boston only |
| 6:00 PM | 1:00 PM | Boston only |
| 7:00 PM | 2:00 PM | Boston only |
| 8:00 PM | 3:00 PM | Boston only |
| 9:00 PM | 4:00 PM | Boston only |
| 10:00 PM | 5:00 PM | — |
| 11:00 PM | 6:00 PM | — |
Understanding the Lisbon – Boston Time Difference
Lisbon runs on Europe/Lisbon, currently WEST (UTC+1:00). Boston runs on America/New_York, currently EDT (UTC-4:00). The gap of 5 hours is simply the distance between those two offsets.
Both cities observe Daylight Saving Time, but they don't switch on the same date — so for a few weeks each year the gap between them is different again. The next shift is on Sunday, October 25, 2026, when Lisbon adjusts its clocks and the difference becomes 4 hours. Anything scheduled across that date needs checking again.
Full clock-change dates: Daylight Saving Time in the United States.
Lisbon today
Boston today
Frequently Asked Questions
What is the time difference between Lisbon and Boston?
Boston is currently 5 hours behind Lisbon. That gap becomes 4 hours on Sunday, October 25, 2026, when Lisbon changes its clocks.
How many hours behind is Boston from Lisbon?
Boston is 5 hours behind Lisbon. Looking at it the other way, Lisbon is 5 hours ahead of Boston.
What time is it in Boston when it is 9:00 AM in Lisbon?
When it is 9:00 AM in Lisbon, it is 4:00 AM in Boston.
Is Boston ahead of or behind Lisbon?
Boston is 5 hours behind Lisbon. Lisbon reaches each point in the day first, so Boston is still getting started while the Lisbon working day is finishing.
What is the best time to call between Lisbon and Boston?
Between 2:00 PM and 5:00 PM Lisbon time, which is 9:00 AM to 12:00 PM in Boston. Both cities are inside normal business hours during that window.
Does the time difference between Lisbon and Boston change during the year?
Yes. Both cities observe Daylight Saving Time, and they do not always switch on the same date, so the gap between them shifts during the year. It changes to 4 hours on Sunday, October 25, 2026.
What time zones are Lisbon and Boston in?
Lisbon uses the Europe/Lisbon time zone, currently WEST (UTC+1:00). Boston uses America/New_York, currently EDT (UTC-4:00).