Ada Lovelace Day takes place on the second Tuesday of October each year. It celebrates women in science, technology, engineering, and maths. Founder Suw Charman-Anderson started the event in 2009. Named after pioneer Ada Lovelace, who wrote the first computer algorithm in 1843 for Charles Babbage’s Analytical Engine, it aims to raise visibility for women in tech and invite girls into code.

What Ada Lovelace Day is about

Ada Lovelace Day is a global celebration of women in science and tech. People and groups around the world join in every October. They share stories of women leaders, run code workshops, and host talks to inspire girls and young coders.

The main goal is to make women in STEM more visible. For many years, female pioneers got little space in history books. This event helps change that old trend. By showing real work in tech, it gives young people classic role models to follow.

Anyone can join the fun. Schools set up science tasks, tech firms host guest speakers, and local groups host Wikipedia writing days. These groups help add pages for female researchers who deserve recognition, creating better records for readers everywhere.

The event also brings focus to healthy workplace culture. It prompts teams to build fair spaces where female coders and scientists can thrive. By joining in across borders, people build lasting support groups for women in technical roles.

Where the day comes from and the date shift

British writer Suw Charman-Anderson created Ada Lovelace Day in 2009. She launched it as a web pledge asking people to blog about women in tech. Thousands of writers answered on 24 March 2009, turning a simple post into a big movement.

Old event databases stored October 10 as a fixed date for the day. That fixed date is wrong for modern events. The celebration moved on early autumn calendars, but organizers soon picked the second Tuesday of October as the fixed rule.

That floating rule makes sure the day falls on a working weekday in term time. Schools, colleges, and tech teams can host talks and code sessions easily. Knowing it lands on the second Tuesday of October helps groups plan well ahead.

Over the past decade, that single day of blogging grew into a worldwide event. Local groups host science shows, panel talks, and hands-on code sessions. What began as one blog post now connects thousands of people joining in to support equal space in tech.

The movement also sparks regional talks through the autumn. While the central day lands in October, many colleges host events into November. This extra time gives groups more chance to highlight local women leaders and share classic success stories.

Ada Lovelace and the 1843 computer algorithm

Ada Lovelace was born on 10 December 1815 at Piccadilly Terrace in Middlesex, London, England. Her father was the poet Lord George Gordon Byron, and her mother was Lady Anne Isabella Milbanke Byron. Her parents split when Ada was small. Her mother pushed Ada to study math and logic.

At 17 years old, Ada met inventor Charles Babbage in 1833. Babbage had designed a counting machine called the Difference Engine. Lovelace was fascinated by the tool and understood how it worked. She became Babbage’s close friend and key partner for the next decade.

Babbage then planned a complex machine called the Analytical Engine. In 1843, Lovelace translated a paper about the machine and added long notes. Her notes were three times longer than the paper. She explained how the machine could run steps using punched cards.

In Note G of her 1843 work, Lovelace wrote a full step guide to compute Bernoulli numbers. That code is seen as the first computer algorithm in history. She saw that machines could move symbols and music, forming the classic idea of modern computing.

Her vision went far beyond simple math. Lovelace saw that a general engine could process any symbols guided by rules. This classic insight foresaw digital software more than a century before electronic computers existed.

Her modern legacy and popular culture

Ada Lovelace’s work still sparks new work for women in tech. In 2011, leaders set up the Ada Initiative to aid female open code developers and web groups. In 2013, team members built the Ada Lovelace Fellowship to fund women seeking doctor degrees in computer science.

Her life story reached TV, books, and games. In the drama Victoria, actress Emerald Fennell played Lovelace with Queen Victoria. Writer Sydney Padua drew a popular graphic novel titled The Thrilling Adventures of Lovelace and Babbage, picturing their machine built and working.

Lovelace also appears in big video games like Assassin’s Creed: Syndicate. She aids the main team to solve old puzzles against the Templars. These classic tales keep her memory fresh, showing her 19th-century ideas still inspire digital media today.

Today, Ada Lovelace Day forms a bridge between computer history and new tech. By celebrating her 1843 work and supporting women in STEM, the day reminds us that great ideas come from all backgrounds when people have room to build.

As code shapes daily life, honoring Lovelace shows the deep history of women in tech. The annual day prompts groups to open doors, welcoming new coders who will write the next chapter of science.

How to join in on Ada Lovelace Day

You can celebrate women in STEM in classrooms, workplaces, or from your desk.