What is the difference between a wedding anniversary and a marriage anniversary?

Answer 1

The difference probably is just semantics, but some countries (like Germany) require a civil ceremony; church weddings are optional. In that case, the marriage anniversary would be the date of the civil ceremony, while the wedding anniversary would fall on the date the couple recited their vows in a church ceremony.

Answer 2

The wedding day is the date of which you and your spouse are united as one flesh under God. It is the day where family members and friends join together to witness and help celebrate this union.

The anniversary is the annual celebration of your marriage. Every year, on the day you were married, is counted as your anniversary.