She does the same for her father every full moon in September.
On my dad's birthday (December 18) and on the anniversary of his death (February 20), my mom does the same for my father, even though they were divorced and remarried to other people. For him, she puts out chicken, orange juice and a candle. My dad once told my mom that he could eat chicken every day of the year. His favorite fruit drink was orange juice, so she would keep him stocked up on orange juice when they were married.
One morning, my mom came outside and found that the chicken was gone. Even though it was most likely an animal that took the chicken, she felt excited to see it was eaten.