I'm curious how it compares to the Iraq War protests on February 15th, 2003.

https://www.academia.edu/6081355/GLOBALIZED_PROTEST_DEMONSTRATING_IN_THE_AGE_OF_GLOBALIZATION_THE_CASE_OF_RALLIES_AGAINST_THE_IRAQ_WAR_IN_2003_1

The study compiles data on 2,976 protests, involving approximately 35.5 million participants, emphasizing discrepancies in reporting and government responses. It highlights the significant role of European countries in the anti-war movement while also noting the participation of Muslim nations, ultimately assessing the impact of globalization on collective protest activities.

Of the 2,976 protests listed, we were able to reconstitute 2,825 cases with sufficient data to be used, i.e. they included, at best, the name of the country, the city in which the protest was held, and attendance figures, or indications making it possible to estimate either the name of the country, the number of protests or the number of demonstrators.

Also, perhaps if you're younger you just happened to miss out on those ones. I remember them, and they were all about preventing the War in Iraq happening. It happened anyway, for what it's worth.