Daylight Savings Time Changes in Portugal 🇵🇹 (1917)
| Country: | Portugal |
| Capital: | Lisbon |
| Abbreviations: | PT, PRT |
| IANA Time Zones: | 4 |
| Dial Code: | +351 |
Daylight Savings Time Schedule and Information
Before
23
:
59
After
01
:
00
28 FEB
28 Feb 1917 - Daylight Saving Time Starts
When local standard time is about to reach Wednesday, 28 February 1917, 23:59 clocks are turned forward 1 hour to
Wednesday, 28 February 1917, 01:00 local daylight time instead.
Sunrise and sunset will be about 1 hour later on 28 Feb 1917 than the day before. There will be more light in the evening.
Also called Spring Forward.
Before
23
:
59
After
23
:
00
14 OCT
14 Oct 1917 - Daylight Saving Time Ends
When local standard time is about to reach Sunday, 14 October 1917, 23:59 clocks are turned backward 1 hour to
Sunday, 14 October 1917, 23:00 local standard time instead.
Sunrise and sunset will be about 1 hour earlier on 14 Oct 1917 than the day before. There will be more light in the morning.
Also called Fall Back.
Daylight Savings Time Schedules by Districts in Portugal (1917)
| District | DST Start (Spring) | DST End (Fall) |
|---|---|---|
| Aveiro | 28 Feb 1917 | 14 Oct 1917 |
| Azores | 28 Feb 1917 | 14 Oct 1917 |
| Beja | 28 Feb 1917 | 14 Oct 1917 |
| Braga | 28 Feb 1917 | 14 Oct 1917 |
| Bragança | 28 Feb 1917 | 14 Oct 1917 |
| Castelo Branco | 28 Feb 1917 | 14 Oct 1917 |
| Coimbra | 28 Feb 1917 | 14 Oct 1917 |
| Évora | 28 Feb 1917 | 14 Oct 1917 |
| Faro | 28 Feb 1917 | 14 Oct 1917 |
| Guarda | 28 Feb 1917 | 14 Oct 1917 |
| Leiria | 28 Feb 1917 | 14 Oct 1917 |
| Lisbon | 28 Feb 1917 | 14 Oct 1917 |
| Madeira | 28 Feb 1917 | 14 Oct 1917 |
| Portalegre | 28 Feb 1917 | 14 Oct 1917 |
| Porto | 28 Feb 1917 | 14 Oct 1917 |
| Santarém | 28 Feb 1917 | 14 Oct 1917 |
| Setúbal | 28 Feb 1917 | 14 Oct 1917 |
| Viana do Castelo | 28 Feb 1917 | 14 Oct 1917 |
| Vila Real | 28 Feb 1917 | 14 Oct 1917 |
| Viseu | 28 Feb 1917 | 14 Oct 1917 |
DST Changes Summary for Portugal
| Date | Year | Change | Time | Details |
|---|---|---|---|---|
| 29 Mar | 2025 | Forward 1 hour | 23:59 ➜ 01:00 | Daylight Saving Start |
| 26 Oct | 2025 | Back 1 hour | 00:59 ➜ 00:00 | Daylight Saving End |
| 28 Mar | 2026 | Forward 1 hour | 23:59 ➜ 01:00 | Daylight Saving Start |
| 25 Oct | 2026 | Back 1 hour | 00:59 ➜ 00:00 | Daylight Saving End |
| 27 Mar | 2027 | Forward 1 hour | 23:59 ➜ 01:00 | Daylight Saving Start |
| 31 Oct | 2027 | Back 1 hour | 00:59 ➜ 00:00 | Daylight Saving End |
| 25 Mar | 2028 | Forward 1 hour | 23:59 ➜ 01:00 | Daylight Saving Start |
| 29 Oct | 2028 | Back 1 hour | 00:59 ➜ 00:00 | Daylight Saving End |
| 24 Mar | 2029 | Forward 1 hour | 23:59 ➜ 01:00 | Daylight Saving Start |
| 28 Oct | 2029 | Back 1 hour | 00:59 ➜ 00:00 | Daylight Saving End |
| 30 Mar | 2030 | Forward 1 hour | 23:59 ➜ 01:00 | Daylight Saving Start |
| 27 Oct | 2030 | Back 1 hour | 00:59 ➜ 00:00 | Daylight Saving End |
Read More About Daylight Savings Time
Common Questions about Daylight Savings Time Changes in Portugal
Does Portugal use Daylight Saving Time in 1917?
Yes, Portugal observes Daylight Saving Time during the 1917 calendar year. The country follows the practice of shifting clocks to better align waking hours with the available evening sunlight during the spring and summer months.
When do the clocks change next in Portugal?
The next scheduled time transition in Portugal will take place on Wednesday, 28 February 1917. At 23:59 local time, clocks will be turned forward by 1 hour. This specific change marks the transition to daylight saving time starts.
Does all of Portugal follow the same time change schedule?
Yes, the calendar dates for starting and ending Daylight Saving Time are consistent across the country. However, because Portugal spans 4 different time zones, the actual moment the clocks move occurs at different times depending on the local timezone of each district.
How will the next transition affect the day in Portugal?
Following the shift on 28 Feb 1917, you will notice that there is more light in the evening compared to the day before. While the transition may temporarily disrupt sleep patterns, the primary goal of this forward shift is to maximize usable daylight for the population.