August 21 Holidays and Memorable Dates: Blackberry Day Gladiolus Day International Day of Remembrance and Tribute to the Victims of Terrorism Internet Self-Care Day No Makeup Day Old Wineskin Day Oratorical Art Day Poet's Day Slavic… #Russian Officer's Day It was decided to celebrate this day on August 21 - the eve of the Day of the State Flag of the Russian Federation, since this state symbol units all officers of the country, regardless of their type of activity.