K.F.
The way I see it. You have set yourself up for disappointment. You admitted they didn't acknowledge your birthday last year yet you expected them to do it this year. That's a set up. Did you let them know how you feel or what you expect? If you didn't then you can't expect them to read your mind and fulfill your wishes. Did your husband let them know just how much you would have wanted them to acknowledge your birthday? If you haven't then you have set yourself up for disappointment.
If you have and then they still don't recognize you, then don't sweat it. Manage your expectations. Card sending seems to be your thing but not theirs. You may need to get your card fix from other people. They may never comply with what you want and how you choose to respond it totally up to you but stop setting yourself up for disappointment when they are only being themselves.
HAPPY BIRTHDAY TO YOU. Don't be sad and stop setting yourself up for disappointment. The only person you can change is you. I really hope this helps.