March 14 will be designated Pi Day Cymru to celebrate the work of William Jones – an 18th century maths genius who changed maths for ever.
Mathematician William Jones, who grew up in Llanfihangel Tre’r Beirdd near Benllech on Anglesey, became the first person to use the Greek letter π (pi) to represent the ratio of the circumference of a circle to its diameter in 1706.
For the first time, March 14 has been designated Pi Day Cymru in his honour, and people are encouraged to celebrate maths and the contribution pi has made to the world.
The Americans have celebrated the day since 1988, and other countries have since followed suit.
The first three digits of pi are 3.14, which equates to March 14 in the American calendar.
If your school would like to take part in Pi Day Cymru in the week leading up to March 14th please contact firstname.lastname@example.org for help with promote your activities.