Triennial cycle

The Triennial cycle of Torah reading may refer to either

• The historical practice in ancient Israel by which the entire Torah was read in serial fashion over a three-year period, or
• The practice adopted by many Reform, Conservative, Reconstructionist and Renewal congregations starting in the 19th and 20th Century, in which the traditional weekly Torah portions are divided into thirds, and in which one third of each weekly "parashah" of the annual system is read during the appropriate week of the calendar.