Helsinki is 1 hour ahead of Oslo. When it's 3:00 PM in Oslo, it's 4:00 PM in Helsinki. Oslo uses Central European Time (CET/CEST) while Helsinki uses Eastern European Time (EET/EEST).
Both cities observe daylight saving time on the same schedule (following EU rules), so the 1-hour difference remains constant throughout the year.
Business hours align well! When it's 9:00 AM - 5:00 PM in Oslo, it's 10:00 AM - 6:00 PM in Helsinki. Both time slots work perfectly for business calls.
Oslo and Helsinki are Nordic capitals with strong cultural and economic ties. Both cities are known for their high quality of life, design heritage, and stunning natural surroundings including fjords and archipelagos.