August carries 149 national days and holidays on Calendar.cx. National Dog Day on August 26 is the month's most widely shared celebration online. International Left-Handers Day (Aug 13) raises awareness for the roughly 10% of the population who are left-handed. Food holidays are plentiful: National Waffle Day (Aug 24), and quirky events like National Tell a Joke Day (Aug 16) and International Bow Day (Aug 19) keep the calendar lively. National Sons and Daughters Day (Aug 11), National Senior Citizens Day (Aug 21), and World Photography Day (Aug 19) round out a month that balances serious awareness with playful celebration.