What is what holiday is september 25th?

September 25th is known as National Comic Book Day in the United States. It is a day dedicated to celebrating and honoring the artistry and storytelling found in comic books. Fans of comics often use this day to read their favorite comics, visit comic book stores, or dress up as their favorite comic book characters. It is a fun and festive day for comic book enthusiasts to share their love for the genre with others.