School Calendar 2025–2026

British Independent School Tradition and the Calendar at ISJ

The history of term dates in UK independent schools is a blend of ancient ecclesiastical traditions, the habits of the British elite in the 1800s, and a deliberate modern desire for academic breathing space. While state schools follow a mandated 190-day school year, independent schools use their autonomy to maintain a calendar that looks quite different.

Many of the UK's oldest independent schools were established by the Church, with calendars built around the Christian liturgical year and the terms of Oxford and Cambridge universities. This history defines the three terms we use today: the Autumn Term, traditionally known as Michaelmas; the Spring Term, often called Hilary; and the Summer Term, traditionally known as Trinity.

It is often observed that schools like ISJ have longer holiday periods than those found in the state sector. Historically, this was due to the intensity of the day. Because British independent schools provide an enriched curriculum that extends well beyond standard classroom hours—including a rich programme of sport, music, and the arts—longer holidays are essential to prevent burnout and ensure pupils remain at their peak.

The one-week half-term break is relatively modern, having been introduced in the mid-20th century as educators began to value the need for a mental reset during long stretches of study. At ISJ, our strategic pauses in October and February provide a break for pupils and staff, ensuring they return to school with energy and enthusiasm.