- Number of holidays
- 10
- Day of the year
- 233
- Days left in the year
- 132
National Senior Citizens Day was proclaimed by President Ronald Reagan on August 21, 1988, to honor the contributions of older Americans and to highlight the challenges they face in health, income, and housing security. Ninoy Aquino Day marks August 21, 1983, when opposition senator Benigno “Ninoy” Aquino Jr. was shot dead on the tarmac of Manila International Airport moments after returning from exile — an assassination that triggered the People Power Revolution and eventually brought his wife Corazon Aquino to the presidency. International Day of Remembrance and Tribute to the Victims of Terrorism was proclaimed by the UN General Assembly in 2017 to honor the victims of terrorism worldwide and to promote human rights and dignity in response to terrorist violence. Hawaiian Shirt Day celebrates the aloha shirt — the loose, brightly printed cotton shirt that Hawaiian garment workers produced in the 1930s from Japanese kimono fabric, worn by surfers and then by tourists who spread it to the world. A proclamation, a tarmac assassination, a UN resolution, and a very loud shirt.
All Holidays On August 21
Hawaiian Shirt Day
Internet Self-Care Day
Kool Aid Day
National Men's Grooming Day
National Senior Citizens Day
National Spumoni Day
Ninoy Aquino Day
About August 21
August 21 Q&As
What is the most popular holiday on August 21?
On August 21, National Senior Citizens Day is the most widely recognized U.S. civic observance, proclaimed by President Reagan in 1988. Ninoy Aquino Day is the most significant national observance, a Philippine national holiday, and International Day of Remembrance for Victims of Terrorism is the most significant UN observance.
What countries celebrate holidays on August 21?
August 21 observances span the Philippines (Ninoy Aquino Day) and the U.S., which hosts National Senior Citizens Day, Hawaiian Shirt Day, International Homeless Animals Day, and Internet Self-Care Day. International Day of Remembrance for Victims of Terrorism is observed globally.
What awareness days are on August 21?
August 21 includes International Day of Remembrance and Tribute to the Victims of Terrorism, proclaimed by the UN in 2017, International Homeless Animals Day, promoting spay and neuter programs for hundreds of millions of homeless animals, and Internet Self-Care Day, encouraging audits of digital habits and screen time.