Ada Lovelace Day (which is much more than just a day) is fundraising.

Ada Lovelace Day is a global day of events celebrating and supporting women in STEM. It’s much more than this too, with the GoFundMe page explaining

Since ALD began, we’ve produced two anthologies of biographies of women in STEM , free women in STEM crochet patterns , a podcast , several careers posters , and a free education pack . We have run an Online Recruitment Fair for Women in STEM , and our Twitter campaigns have included a Christmas STEM advent calendar and the Twelve Days of STEMmas .
We recently launched the Finding Ada Network , a unique mentorship and knowledge sharing platform for women in STEM and the people who act as advocates for gender equality. 

All that activity costs money, and this has until now relied on sponsorship. But, the post explains

Ada Lovelace Day needs your support to survive! As a sponsor-funded event, we have been badly affected by Brexit as companies cut their marketing and CSR budgets and delay spending decisions. So we need you to help us out and ensure that we can continue our work supporting girls and women in STEM. 

There’s a FAQ list and more information at GoFundMe: Ada Lovelace Day: Supporting women & girls in STEM.