Podcast:99% Invisible Published On: Tue Jun 07 2016 Description: September 3rd, 1967, also known as H-Day, is etched in the collective memory of Sweden. That morning, millions of Swedes switched from driving on the left side of the road to driving on the right. The changeover was an unprecedented … Continue reading → Subscribe to SiriusXM Podcasts+ on Apple Podcasts to listen to ad-free new episodes and get exclusive access to bonus content.