I guess we need this... or since people never shut up about Batman in general you could say every day is Batman day? Really, it's what Bruce wants, right? I think he'd pick a Thursday personally, but, hey... his overlords have spoken. From DC:
DC Entertainment will join millions of fans in celebration of the pop culture phenomenon as Saturday, September 17th is officially announced as BATMAN DAY 2016.
Celebrating Batman’s endearing legacy with generations of fans, DC Entertainment will once again fete the iconic legend with festivities at thousands of comic book retailers, bookstores, schools and libraries across the country. Retail activities include free comic book giveaways and talent signings. Confirmed signing events feature blockbuster talent like Frank Miller, Scott Snyder, Tom King, James Tynion IV, and Greg Capullo with many more to be announced.
In addition to DC Entertainment, BATMAN DAY participating partners include many Warner Bros. divisions, as well as Warner Bros. Consumer Products licensees -- Capstone Young Readers, Penguin Random House, Scholastic, DK Licensing, Bendon, and HarperCollins. These partnerships provide the unique opportunity for retail and digital promotion across various media in celebration of the Dark Knight.
The annual fan-favorite event, now in its third year, was first introduced to honor the iconic character’s 75th anniversary. Continuing the BATMAN DAY tradition, DC Entertainment will present Bat-centric promotions, fan giveaways and more, all to honor the character that has become a Super Hero to many generations and continues to inspire fans across the globe.
The official BATMAN DAY event kit will include activity sheets, trivia, and games and will be available for download on http://www.dccomics.com/batmandaykit.