In Wales the first day of winter is known as Calan Gaeaf and is celebrated on 1st November; the day before it is known as Nos Calan Gaeaf. Spirits are abroad at these times and people avoid churchyards, stiles and crossroads. This is related to the legend of the Cutty Black Sow or Yr Hwch Ddu Gwta, a tailless black sow with a headless woman. People would write their names on stones and place them in a fire, if the next day any stones were found to be missing then that person was thought to die within one year. This custom was known as Coelcerth. Another part of this season was a custom known as Twco Fala, which we know as apple bobbing, very familiar from Halloween.