July 4th and a spillover to July 5th are dates of the year with the most mass shootings. Each date has more than twice as many as the next (which is July 1). This is based on my analysis of incidents with 4+ killed or injured from the @GunViolenceArch:
nytimes.com/2026/07/05/us/…
nytimes.com/2026/07/05/us/…