Easter date algorithm
This activity is based on determining the date of Easter Sunday using an algorithm known as "Ten Divisions to Easter". The activity can be extended by asking questions about the long-term trends in the data.
Teachers' notes give a suggested approach to the topic and provides ideas for extensions. Students can explore the earliest and latest possible dates Easter can occur and the probability for Easter happening on any of the possible dates. For this part of the task access to a computer is essential.
The activity sheet contains a brief background to the topic and shows each step of the algorithm.
Show health and safety information
Please be aware that resources have been published on the website in the form that they were originally supplied. This means that procedures reflect general practice and standards applicable at the time resources were produced and cannot be assumed to be acceptable today. Website users are fully responsible for ensuring that any activity, including practical work, which they carry out is in accordance with current regulations related to health and safety and that an appropriate risk assessment has been carried out.