The Tuesday following Easter Monday is a school holiday (not a statutory holiday), meaning schools must not be open.
Since the advent of the 4-term year in 1996, the terms and holidays are usually set so that Easter occurs during the first term break and the Easter Tuesday school holiday goes unnoticed. However, in some years Easter falls much earlier than usual such as this year.
To have the first 2-week break at Easter in those years would shorten the first term to only 8-9 weeks. As the Minister aims to set four terms of reasonably uniform length, in years when Easter falls particularly early, all or some of the Easter break will be during the first term.