Compounds of 五夜

• 五夜
  (n) (1) (arch) division of the night (from approx. 7 pm to 5 am) into five 2-hour periods
  (2) the fifth of these periods (approx. 3 am to 5 am)
• 十五夜
  (n) night of the full moon
  the night of the 15th day of the 8th lunar month