June 21, 1919 - Despite warnings from officials another pro-strike parade is scheduled for 2:30 p..m.. The crowd is to gather outside city hall for a march to the Royal Alex hotel where federal officials are staying.
Mayor Gray comes onto the balcony of city hall to read the riot act and gives people 30 minutes to disperse. While re-entering the building the crack of a gunshot is heard causing panic in the crowd. In the melée strikers and police turn on each other and Saturday, June 21 becomes Bloody Saturday.
A timeline of events that day can be seen at my 1919 General Strike blog.