Article makes a point of the fact that the synagogue was 33 years old and that the celebration lasted from 11AM to 7PM
they were hosting a Passover Holiday Celebration that began at 11 a.m. and was set to end at 7 p.m. with a final Passover meal.
The shooting took place around 11:30 a.m. PST, at the Chabad of Poway, a 33-year-old synagogue in a town of about 50,000 people located just northeast of San Diego.
https://www.thedailybeast.com/san-diego-synagogue-shooting-multiple-people-including-children-injured-at-synagogue-chabad-of-poway-suspect-in-custody?ref=home