In its full opening day, Watchmen pulled in an estimated $25.1 million on approximately 7,500 screens at 3,611 theaters, including an estimated $4.55 million from its first midnight shows. That ranks as the eighth-highest grossing opening day for a superhero movie and 32nd among all movies. Adjusted for ticket price inflation, other comic book adaptations rate higher opening days, including the first X-Men and Hulk pictures, but Watchmen's first day wasn't far off from the first weekends of previous Alan Moore adaptations V for Vendetta and The League of Extraordinary Gentlemen.
Among R-rated movies, Watchmen's opening day was fifth behind The Matrix Reloaded, 300, Sex and the City and The Passion of the Christ. 300, the previous picture from Watchmen director Zack Snyder and the one referenced prominently in Watchmen's advertising campaign, raked in $28.1 million in its opening day on around 4,800 screens at 3,103 sites. That picture was released in early March 2007 and holds the overall March record for opening weekend ($70.9 million).