The feast of Annunciation of the Virgin Mary is one of the Twelve Great Feasts of the Orthodox Church. It falls on March 25 in the Julian calendar, which corresponds to April 7 in the Gregorian calendar.
World Health Day is an annual awareness day observed on April 7. It was proclaimed by the World Health Organization to commemorate the anniversary of the establishment of the WHO in 1948.
Day of Remembrance of the Victims of the Rwanda Genocide (also known as International Day of Reflection on the Genocide in Rwanda) is an annual United Nations observance held on April 7. It is the start date of the 1994 genocide in Rwanda.