July 31 is Feast Day of Ignatius of Loyola. This saint is primarily known as the founder of the Society of Jesus.
World Ranger Day is an annual holiday established by he International Ranger Federation to celebrate the contribution of park rangers to nature protection and commemorate rangers who died or were injured in the line of duty. It is celebrated on July 31.
Australians are concerned about the environmental situation of Australia. Many ecological observances were created to raise public awareness of environmental issues. One of these observances is National Tree Day in Australia, that is annually observed on the last Sunday in July.
The fans of J. K. Rowling's saga about the world of wizards annually celebrate Harry Potter's Birthday on July 31. According to the story, invented by Rowling, the boy who lived was born on this day in 1980.