International Women’s Collaboration Brew Day blue vector icon. International Women`s Collaboration Brew Day IWCBD is an annual event that celebrates the hard work and achievement of women in the craft brewing industry. The event takes place on the first Friday in March, and this year it falls on March 6th. It was first founded in 2014 by a group of female brewers from around the world who wanted to come together to create a beer that brought people from different countries and cultures together. The IWCBD vector icon is a symbol of unity amongst these women, representing their shared commitment and enthusiasm for craft beer brewing.