The Yizkor prayers are said in the Synagogue on four occasions during the year, on the last day of each of the Festivals of Pesach, Shavu'ot and Sukkot and on Yom Kippur, the Day of Atonement. In these prayers we ask God to 'remember' the souls of family and friends who have passed away. In reality is an opportunity for us to dwell on the memories of our departed relatives, to remember them as they were and to draw inspiration from their lives.
Further reading on Yizkor prayers can be found in the Personal Practice section. On these pages you can read and hear the three parts of the Yizkor service: