Anniversaries are only partly about marking time that has already passed and celebrating the (perhaps improbable) arrival of another annual marker of persistence.
Anniversaries are also about committing to the future. Again.
The future probably looks different from the vista of this anniversary than it did the last one. Maybe that last one was in a valley. What are we committing to between now and the next anniversary? What do we hope the next one looks like?
My wife and I celebrate our 15th wedding anniversary today. By this day next year we hope to be completely rid of student loans. It will be our first debt free anniversary.
Every anniversary is special, and 15 is multiple-of-five extra special. But we’ve got our sights set on 16, for sure.
YoRocko! 
I am happy for you and for the next anniversary, four score four. Scale the future like a mountain climber! Returned from Peru a few days ago with Wendy Gist (Maya Aga, Jenny Eazell, Clara Becker, Henrick from CPC) and others from San Gabriel Presbytery. Most definitely a vista work trip.