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pi day

Introducing Wales to PI Day Cymru

As part of the Welsh Government’s initiative to drive up numeracy levels, we were tasked with promoting the first national PI Day in Wales, celebrating Wales’ connection with William Jones of Anglesey- the first person to use the symbol π to represent PI.



  • Establish 14 March 2015 as PI Day Cymru, sparking interest and conversation around maths and Pi

  • Make the people of Wales aware of the Welsh link to Pi

  • Engage with parents, pupils and teachers to get them informed about Pi Day Cymru.

What we did

  • Announced PI Day Cymru in the national media with backing from the Welsh education Minister to encourage teachers and pupils to get involved in activities on March 14th
  • We followed this up with stories detailing regional activities taking place during the week leading up to Pi Day for local media
  • Alongside print, broadcast and online media we targeted maths, science and education bloggers to spread the word about Wales’ connection with the mathematical equation
  • We enlisted the help of pupils from Ysgol Llangefni for a picture and broadcast opp in which they re-named the famous Llanfairpwllgwyngyllgogerchwyrndrobwllllantysiliogogogoch Railway Station as LlanfairπG
  • In the theme of all things PI, we teamed up with Welsh food brand Peter’s Pies to create a giant π symbol at a School in Swansea, working with the teachers we developed a series of PI related tasks for pupils.






  • Achieved 48 pieces of coverage across a mixture of national, regional, online and broadcast media
  • Key coverage hits including Guardian Online, BBC Radio 4’s Today programme and BBC Wales Today
  • During the period 9th – 18th March 2015, 295,536,773 had the opportunity to read, see or hear about PI Day Cymru in the print, online and broadcast media.