Within four days, #YesAllWomen was used about how many times on Twitter?

Within four days, #YesAllWomen was used about 1.2 million times on Twitter.

The hashtag emerged in May 2014 after the Isla Vista killings in California, when online discussions about violence against women and misogyny prompted women to share experiences of harassment, fear, and discrimination. Its central idea was that although not all men commit violence, all women face risks and gender-based sexism.

The hashtag spread rapidly because users connected a breaking-news conversation with everyday experiences that often received little attention. Within four days of its first use, it had been tweeted approximately 1.2 million times, making it one of the most prominent social-media discussions about violence against women at the time.

The figure is sometimes confused with later cumulative counts or with other viral hashtags. The question asks specifically about the first four days, so 1.2 million is the canonical statistic—not 10 million, 3.4 million, or 250,000.