October 1 is the 274th day of the Gregorian calendar. Here are some of the holidays and observances that fall on October 1, 2023:

• National Hair Day
• International Coffee Day
• International Day of Older Persons
• International Raccoon Appreciation Day
• World Vegetarian Day
• World Sake Day
• National Fire Pup Day
• National Pumpkin Spice Day
• National Green City Day
• National Black Dog Day

It is also worth noting that Congress established Yosemite National Park on October 1, and Stanford University opened in California on this day.