Vampires, along with witches, were believed to be most active on the Eve of St George's Day April 22 of the Julian calendar, May 4 of the Gregorian calendar, the night when all forms of evil were supposed to be abroad. St George's Day is still celebrated in Europe. A vampire in the grave could be told by holes in the earth, an undecomposed corpse with a red face, or having one foot in the corner of the coffin. Living vampires were found by distributing garlic in church and seeing who did not eat it. Graves were often opened three years after death of a child, five years after the death of a young person, or seven years after the death of an adult to check for vampirism. Measures to prevent a person becoming a vampire included, removing the caul from a newborn and destroying it before the baby could eat any of it, careful preparation of dead bodies, including preventing animals from passing over the corpse, placing a thorny branch of wild rose in the grave, and placing garlic on windows and rubbing it on cattle, especially on St George's & St Andrew's days. To destroy a vampire, a stake was driven through the body followed by decapitation and placing garlic in the mouth.