An anniversary is a day that commemorates an event that occurred on that same date in a past year. Anniversary celebrations recognize the significance of the event. A sweet anniversary quote relays personal value or meaning of the anniversary to those it is shared with.
From husband to wife, a sweet anniversary quote would be, "Darling, for the wondrous time we have spent together as well as the time we will have, you have given me a new purpose: Love. Happy Anniversary."
Sweet anniversary quotes are also shared from those not directly involved in the anniversary, for example, "I'm so glad to have met you both, you have put a fire into my heart to find a love like yours. Happy Anniversary."