Pesah, or Passover is one of the most significant Jewish holidays. It commemorates the liberation of the Jewish people from slavery in ancient Egypt and the story of the Exodus. This festival commences on Nisan 15 and lasts for seven days in Israel and for eight days in the diaspora.
April 12 is World Aviation and Cosmonautics Day in many countries around the world. This holiday was established to commemorate the first manned flight into space.
International Day of Human Space Flight is one of the UN international observances. It's annually observed on April 12, the anniversary of the first human space flight.
The Day of Pink, sometimes referred to as the International Day of Pink, is a Canadian anti-bullying awareness campaign held on the second Wednesday of April. On this day, people are encouraged to wear an item of pink clothing to raise awareness of bullying, discrimination, homophobia and transphobia.