International Women's Collaboration Brew Day

International Women's Collaboration Brew Day (IWCBD) is an annual event that takes place each year on International Women's Day (8 March). The event gathers women brewers around the world who brew a beer around that year's theme. It was established to raise awareness of women in the brewing industry, especially as beer brewmasters. It also networks women interested in brewing.

From 2025, the event is organised by Women On Tap CIC, marking its return after a year hiatus with the theme UNITE SOCIETY. Brewers are encouraged to use the event to raise funds for, or donate to, women's causes. Commercial breweries are encouraged to commit to a minimum £100 donation to a non-profit women's organisation or group. The Society of Independent Brewers (SIBA) is the campaign’s headline partner, with Wine & Spirit Education Trust (WSET) on board as an Education Partner, and additional sponsorship pledged from Simpsons Malt.