- Sarah Brown is the wife of British Prime Minister Gordon Brown, a charity campaigner and Twitter enthusiast.  Follow her on Twitter @SarahBrown10.  The opinions expressed are her own. -

On the 8th of March, the web lit up with blogs and tweets and facebook messages to mark International Women’s Day. I joined thousands of women on London’s Millennium Bridge as part of a global effort to unite women to serve the causes of peace and development and was very pleased to discuss our shared aspirations for women with U.S. First Lady Michelle Obama in a web exclusive for Number 10.

But somehow one day doesn’t seem enough to reflect on what women have achieved, and on how far we still have to travel along the road to equality. So we have extended International Women’s Day to a whole month of focus on gender at Downing Street and today I’m blogging for Reuters in honour of Ada Lovelace Day.

You might not have heard of Ada – but you wouldn’t be reading this without her. Everybody knows about the fathers of computing – people like Charles Babbage and Alan Turing – but it’s time to celebrate the mothers too.

Ada Lovelace was one of the first ever computer programmers and Ada Lovelace Day (tagged as #ALD10 on Twitter) is our chance to draw attention both to what she achieved, and to the women who stand on her shoulders today.