text: Many secular Jews attend synagogue on Yom Kippurâ '' for many secular Jews the High Holidays are the only recurring times of the year in which they attend synagogue , â '' causing synagogue attendance to soar , and almost four-fifths fast .
simplified: Many Jews fast and attend synagogue on Yom Kippur , where the number of worshippers attending is often double or triple the normal attendance . Many other Jews choose not to fast