Ada Lovelace Day – held the second Tuesday in October every year – is an international celebration of the achievements of women in science, technology, engineering and maths (STEM). Ada Lovelace Day aims to increase the profile of women in STEM and to highlight role models who will encourage girls to explore STEM careers and to support women already working in STEM. Ada Lovelace (1815-1852) is often referred to as the ‘first computer programmer’ and her work inspired Alan Turing’s work on the first modern computers in the 1940s.