<P> The academic term for senior high school (grades 11 and 12) operates on a semestral basis . Semestral, Christmas, and summer breaks are scheduled at about the same time as primary and junior high school . Grade 12 pupils have a shorter second semester than grade 11 in order for the school to prepare for graduation . </P> <P> In most schools, summer break usually lasts for two months, starting from the first week of April up to the last week of May . Most schools end the school year before Holy Week . Semestral break is normally set to coincide with All Saints and All Souls Day . The Christmas Break usually begins in the third week of December, and classes resume the Monday or week after New Year's Day (unless that Monday is January 2). Commencement ceremonies are often held in late March or early April . </P> <P> Exceptions to this general schedule are international schools operating in the country, which normally follow their home country's respective school system . </P> <P> For most universities and colleges, an academic year is divided into two semesters, each up to 18 weeks long except for senior students in their final semester where they end the semester two weeks earlier . Enrollment / registration in an institution is usually good for only one semester: a student who successfully registers for the first semester is not automatically enrolled to study in the second semester . The student will need to successfully complete clearance requirements and in a few cases, maintain a certain overall mark in order to progress in her university studies in the next semester . The first semester is followed by a break consisting of two to four weeks before the second semester, called the Semestral Break, which usually occurs between the second week of October to the second week of November for all universities and colleges . The Semestral Break can be two to three weeks long, and normally includes the All Saints' and All Souls' holidays . </P>

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