Ada Lovelace Day is observed worldwide every second Tuesday of October to celebrate the contributions of women in science, technology, engineering, and mathematics (STEM). Established in 2009, the day aims to increase the visibility of women's scientific achievements and encourage discussions about their roles in these fields. The holiday is named after Ada Lovelace, a pioneering English mathematician recognized as the first programmer for her work on Charles Babbage's Analytical Engine. Lovelace translated and expanded upon an article about the Engine, producing what is considered the first computer program, although the machine was never completed, and her program was never tested. The observance highlights the ongoing challenges women face in STEM and seeks to inspire future generations to engage in these disciplines.