The term urabone (ullambana) refers to the last day of an ango practice (the three-month intensified practice of Zen Buddhism), on July 15th in the old calendar, but urabone is mostly used to indicate a memorial service offered for ancestors' souls to relieve severe sufferings on that day.
盂蘭盆会（うらぼんえ、ullambana、）とは、安居（あんご）の最後の日、7月15日(旧暦)を盂蘭盆(ullambana)とよんで、父母や祖霊を供養し、倒懸（とうけん）の苦を救うという行事である。