The wedding anniversary can be calculated either according to the license date, or according to the wedding day, which is the legal wedding day, and the wedding day is the official wedding day in the eyes of friends and relatives, or one of the two. In the second year, the same day as the license or wedding date is the first anniversary of the marriage, and the subsequent wedding anniversary years can be calculated in turn. If the calculation basis date is selected, it can not be changed at will, otherwise it is easy to confuse.
