Death anniversary, what to do?

My husbands child passed away 5 years ago. We talk of them often, and our kids know about them. But I’m always on the fence what to do on anniversary days...

Should we do anything special? Should we not talk about the bad day?

What would you do? Normally he’s working so I always make sure to text him I’m thinking of him and love him, but this year it’s on the weekend, so we can do something. Suggestions?