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Daylight Saving Time (DST) Not Observed in Year 1970
Viana do Castelo observed Central European Time (CET) all year.
DST was not in use in 1970.
Daylight Saving Time History in Viana do Castelo
Detailed history for Viana do Castelo is not available before 1970. Statistics below are based on 1970 onwards.
- Viana do Castelo first observed Daylight Saving Time in 1977.
- Viana do Castelo has observed DST for 49 years between 1977 and 2025.
- See Worldwide DST Statistics