<P> Dagen H ( H day ) , today usually called `` Högertrafikomläggningen '' ( `` The right - hand traffic diversion '' ) , was the day on 3 September 1967 , in which the traffic in Sweden switched from driving on the left - hand side of the road to the right . The `` H '' stands for `` Högertrafik '' , the Swedish word for `` right traffic '' . It was by far the largest logistical event in Sweden 's history . </P>
<P> Dagen H ( H day ) , today usually called `` Högertrafikomläggningen '' ( `` The right - hand traffic diversion '' ) , was the day on 3 September 1967 , in which the traffic in Sweden switched from driving on the left - hand side of the road to the right . The `` H '' stands for `` Högertrafik '' , the Swedish word for `` right traffic '' . It was by far the largest logistical event in Sweden 's history . </P>
the day sweden changed from left to right
the day sweden changed from left to right
3 September 1967
3 September 1967