Original article by BrideMalta.com
For now, you are probably wearing the engagement ring on the left hand and the steady ring over it, because the engagement ring is the one 'closest to the heart'.
However, on your wedding day, you will want to have the wedding ring 'closer to the heart', so you shouldn't wear any rings on the left hand. You can wear the engagment ring (and if you want the steady ring too) on the right hand. Another reason for this is so that the focus on the left hand that day will be completely on the wedding ring.
After that day, you can wear (starting from close and moving out) the wedding ring, the engagement and if you want also the steady ring. The steady ring is a matter of opinion because you can wear it on the right hand if you think that 3 rings on the left are too many. It is no longer as important as it was before you get married, because the wedding ring is the 'new steady ring' now.