Did you know that February is National Weddings Month? Makes sense because it is the month of Love. February is considered National Wedding Month not because of the number of weddings that take place, but because this is when the most couples start planning for the big day.
It seems that long before they knew a lot about anatomy it was theorized that there was a vein running directly from that finger to the heart. That is how the tradition of wearing it on the left hand ring finger started. Now that theory has been proven untrue, but because of tradition it has become custom to wear the wedding ring on that finger source: http://mosaicfrog.com/Rings_an