S.H.
My Dad, died about 10 years ago.
Each year on his date of passing... we all go to the cemetery and bring him flowers... the kids tell him something and that they love him etc.
We also on that day or night, have a nice dinner or lunch together.
Don't worry about 'how' the others act on that day. Just do what YOU want to do.... and recognize that day or not. Everyone deals with death/grieving differently.
My Mom, went to a "grief support" group... when my Dad died. She still sometimes attends it, when she feels sorrowful.... It helps her Immensely.
For me, I miss my Dad a great deal.... we were very close. I often talk to him... or to his photo which we still display on our shelf. And I bring him flowers at the cemetery whenever I feel like it.
My Dad.... was the ONLY person... that truly knew me... and accepted me for who I was. I miss him dearly... but I am happy... because I saw him before he died and breathed his last breath and he said my name and smiled... I will always remember that. And I know, he is in a better place... now. He had had many health problems...
I might suggest, you find a "grief support group." My Mom, met MANY good people there.... who were all feeling the same as her... It is very helpful. "Grieving" can take time....
Hugs to you,
All the best,
Susan