October 4th is celebrated as several holidays and observances. The most popular holiday celebrated on October 4th is National Taco Day. Other holidays and observances celebrated on October 4th include:

• World Animal Day
• National Cinnamon Roll Day
• National Vodka Day
• Improve Your Office Day
• Kids Music Day
• Feast of St. Francis of Assisi
• International Walk to School Day
• Kindness to Animal Day
• Lesotho Independence Day
• Blessing of the Animals
• Balloons Around The World Day
• National Golf Lovers Day
• Coffee with a Cop Day
• National Truckers Appreciation Day
• World Animal Day
• Ship in A Bottle Day

Therefore, October 4th is celebrated as National Taco Day, World Animal Day, and several other holidays and observances.