Red Hat Society Day
Red Hat Society Day is held on April 25. The Red Hat Society [RHS] is an international social organization that was founded in 1998 in the United States for women age 50 and beyond, but now open to women of all ages. There are over 20,000 chapters in the United States and over 30 other countries. This event in the third decade of the month April is annual. 
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If you're an energetic, playful, and spirited woman over 50, the Red Hat Society wants you! British poet and children's author Jenny Joseph penned the poem Warning, the inspiration for the Red Hat Society, in 1961. The poem starts, "When I am an old woman, I shall wear purple, with a red hat that doesn't go." Society founder Sue Ellen Cooper, known as "Exalted Queen Mother," gifted a friend a copy of this poem and a red hat. Red Hatters Are Never Too Old to Dress Up. The society decrees that no one can wear red and purple until her 50th birthday. These "rules" were created to encourage women not to dread turning 50, but to instead trumpet its arrival.
Similar holidays and events, festivals and interesting facts
International Girls in ICT Day on April 24 (aims to encourage and empower girls and young women to consider studies and car eers in the growing field of Information and communications technology);
Wiener Töchtertag or Daughter's Day in Austria on April 25 (an annual event where girls can broaden their horizons in choosing a career. The initiative of a woman adviser, Catherine Gaal, in cooperation with the Vienna Economic Chamber and the Directorate of Education in Vienna);
Töchter-Tag or Daughter's Day in Hamburg, Germany on April 26 (The Youth Education Association became the initiator in Hamburg. The idea is to introduce girls to technical professions);
Therapeutic Massage Awareness Day on May 1 (since 2014);
Mother's Day in Hong Kong on May 4 (also Hungary, Lithuania, Mozambique, Portugal, Spain, Romania; celebrated on the first Sunday in May);
Wife Day or Day of the myrrh-bearing women on May 4 (Orthodox celebrate on the second Sunday after Easter);
Senior Citizens Day in Palau on May 5