1. 万圣节前夕（10月31日晚，传说此时可见鬼巫。当晚儿童常化装成鬼巫尽情玩闹）
Halloween is the night of the 31st of October and is traditionally said to be the time when ghosts and witches can be seen. On Halloween, children often dress up as ghosts and witches.

e.g. He had insisted that she come up to Lawford for the Halloween party.
他执意要她来劳福德参加万圣节聚会。