A Community Passover Seder will be held at Congregation Beth Israel of the Merrimack Valley, 508 South Main St., Route 28, on the second night of the holiday, Saturday, April 4, beginning at 6 p.m. Rabbi Howard Mandell will lead the family-friendly Seder, which will be geared toward people of all faiths and ages. Guests will enjoy a fully catered kosher meal and participate in the singing of traditional songs.