26 Oct 2025, 02:00
27 Mar
Forward 1 hour
27 Mar 1977 - Daylight Saving Time Started
When local standard time was about to reach
Sunday, 27 March 1977, 00:00:00 clocks were turned forward 1 hour to
Sunday, 27 March 1977, 01:00:00 local daylight time instead.
Sunrise and sunset were about 1 hour later on 27 Mar 1977 than the day before. There was more light in the evening and less light in the morning.
Also called Spring Forward, Summer Time, and Daylight Savings Time.
25 Sep
Back 1 hour
25 Sep 1977 - Daylight Saving Time Ended
When local daylight time was about to reach
Sunday, 25 September 1977, 01:00:00 clocks were turned backward 1 hour to
Sunday, 25 September 1977, 00:00:00 local standard time instead.
Sunrise and sunset were about 1 hour earlier on 25 Sep 1977 than the day before. There was more light in the morning and less light in the evening.
Also called Fall Back and Winter Time.
Daylight Saving Time History in Porto
Detailed history for Porto is not available before 1970. Statistics below are based on 1970 onwards.
- Porto first observed Daylight Saving Time in 1977.
- Porto has observed DST for 49 years between 1977 and 2025.
- See Worldwide DST Statistics