This is a favorite statuette I keep in my room at home. I bought it from a gift shop over 10 years ago.
When the Angel Gabriel visited Mary at the Annunciation, he proclaimed the most amazing news of God coming to earth in the form of a baby, and Mary was the mother of choice. Faithful as she was, Mary had a hard time absorbing this and asked, "how can this be?" Once explained by the archangel that the Spirit will bring this about and all that was needed was her consent, Mary unhesitatingly said, "let it be done to me as you have said." And the mystery of the Incarnation took place. And that was that.
That was just the beginning. The "yes' that Mary uttered that day was repeated many more times throughout her lifetime: on her journey to Bethlehem, her giving birth in a cave, her flight into Egypt, at Calvary, etc.
It is the same with us. God comes to us at every moment of our life and continually asks us, "will you do this for me now?" And over and over, we try to surrender our will and say daily, "Yes, Lord, let your will be done as you please." It is our daily "annunciation."