Anniversary Of Death
Noun
かいき
今年は祖父の三回忌です。
Today is the third anniversary of my grandfather’s death.
The times when you are in mourning each year are for a loved one's death anniversary. They come around again every year. It's important you remember your loved ones at this time.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.