Jewish Beliefs on Prayer
Likewise, Jews also traditionally pray a fixed set of times each day. However, rather than numbering five, these Jewish formal daily prayers occur at only three times each day — at morning, afternoon, and evening. (A fourth daily prayer is added on sabbaths and holidays, and a fifth one for Yom Kippur, Judaism’s most sacred holy day.)
Daily synagogue services are held corresponding to each of these three daily Jewish prayers. Of the four major contemporary branches of the Jewish faith, both Orthodox Judaism as well as Conservative Judaism regard the three daily prayers as mandatory; Reform Judaism and Reconstructionist Judaism both consider them optional, a matter of personal choice.