The trimester schedule divides the academic year into three sessions: fall, winter, and spring, each trimester being approximately 12-13 weeks long. Classes are 67 minutes long and meet five days per week. One 35 minute CORE period is offered each day to ensure all students are developing skills to be Life Ready and to have high-quality learning opportunities. A typical day of classes (Monday, Tuesday, Thursdays and Fridays) at Westfield High School begins at 8:35 a.m. and ends at 3:39 p.m. On Wednesdays, we are on a late start schedule, beginning at 9:05 a.m. Three 30-minute lunch sessions are offered during third period each day. Seven minutes is allowed for passing periods between classes.