[1] In 2019 MWI engaged over 400,000 people on an island with a population of under 7 million and is arguably the world's largest mathematics festival.
[2][3] MWI is a partnership of over 50 organizations dedicated to promoting and celebrating mathematics across the island of Ireland, including universities, institutes of technology, colleges, museums, libraries, visitor centres, and other professional bodies.
[5] MWI targets school and universities, as well as hosting weekend "street fairs" in cities such as Dublin, Belfast and Cork.
Maths Week is a nine-day event (a Saturday to the Sunday of the following weekend, inclusive) which always includes the 16th of October, the day in 1843 when William R. Hamilton discovered quaternions.
[7] MWI hosts the Maths Ireland website which is home to the monthly blogs[8] of the Annals of Irish Mathematics & Mathematicians (AIMM), authored by Colm Mulcahy.