In the Jewish religion we have a yearly remembrance for people. In Yiddish the period is called Yahrzeit (Year Time, if this were German the word would be Jahreszeit and means Season. In this case I think a better translation for the Yiddish is probably Anniversary).
It's mainly observed for parents. There are certain prayers that are said, a 24 candle is lit on the day, and the grave is visited. I didn't go to my father's yet this year. His was in March. But I'll go some time. My brother will stop by my Dad's grave from time to time not only at Yahrzeit time. And I went in honor of my Dad's birthday last year.
Since I don't have any children-I doubt anyone will be celebrating my Yahrzeit.
Gman