It's My Grandfather's 40th Day

he readers would probably ask what do you mean by 40th day? The 40th day that i mentioned in the title is my grandfather's 40th day in the cemetery. My parents went to Pangasinan to pray for our recently passed grandfather. I dont know what kind of tradition is that, i think it is an old tradition that my parents knew. Its a long journey from Pasig to Pangasinan and it will take them a 4 hour trip going there and another 4 hour trip if they're going home