Happy (but also sad) Anniversary

Today would have been my parent's 54th wedding anniversary.  Even though my mom isn't here anymore I know that my father's heart is still very much with her and I'm sure this day isn't an easy one for him. The trouble is, should I wish him a Happy Anniversary or is it better that I just not bring it up?  I remember that last year I didn't say anything and since I'm not quite sure what to do today, I will wish them a Happy Anniversary from here. Here they are in all their cute, wonderful and together glory:

Mira and Aldo, July 2013