Holidays calendar August 2021‹ July 2021September 2021 ›DatePopular holidaysOther holidays and observances1 SundayWorld Wide Web Day,International Assistance Dog Week,World Lung Cancer Day,Girlfriends Day,Sisters' Day,World Breastfeeding Week2 MondaySummer Bank HolidayColoring Book Day,International Assistance Dog Week,World Breastfeeding Week3 TuesdayInternational Assistance Dog Week,Clean Your Floors Day,Watermelon Day,World Breastfeeding Week4 WednesdayInternational Clouded Leopard Day,International Assistance Dog Week,World Breastfeeding Week5 ThursdayUnderwear Day,Oyster Day,International Assistance Dog Week,World Breastfeeding Week6 FridayInternational Beer Day,International Assistance Dog Week,Fresh Breath Day,World Breastfeeding Week7 SaturdayAged Care Employee Day,International Alopecia Day,International Mustard Day,International Assistance Dog Week,Disc Golf Day,World Breastfeeding Week8 SundayInternational Cat Day9 MondayBook Lovers Day,International Day of the World's Indigenous People10 TuesdayWorld Lion Day11 WednesdayWorld Calligraphy Day12 ThursdayWorld Elephant Day,International Youth Day13 FridayInternational Left Handers Day14 SaturdayBowling Day15 SundayInternational Lighthouse Day16 MondayWorld Roller Coaster Day17 TuesdayThrift Shop Day,Day of Positively Twisted People18 WednesdayIce Cream Pie Day19 ThursdayWorld Photo Day,International Orangutan Day,World Humanitarian Day20 FridayWorld Mosquito Day21 SaturdayInternational Homeless Animals’ Day,World Optimist Day,Daughter-in-law Day,International Geocaching Day,International Day of Remembrance and Tribute to the Victims of Terrorism22 SundayWorld Plant Milk Day,International Day Commemorating the Victims of Acts of Violence Based on Religion and Belief23 MondayInternational Day for the Remembrance of the Slave Trade and Its Abolition24 TuesdayPluto Demoted Day25 WednesdayInstant Soup Day26 ThursdayInternational Dog Day,Glitter Day27 FridayInternational Gamebook Day28 SaturdayBow Tie Day,International Bat Night29 SundayInternational Day against Nuclear Tests30 MondaySummer Bank HolidayInternational Day of the Disappeared,International Whale Shark Day,International Day of the Victims of Enforced Disappearances31 TuesdayInternational Day for People of African DescentSuccess!Error!