fes·tiv·i·ty /fɛsˈtɪvəti, fəs-/
  歡宴,歡慶
  Fes·tiv·i·ty n.; pl. Festivities
  1. The condition of being festive; social joy or exhilaration of spirits at an entertaintment; joyfulness; gayety.
     The unrestrained festivity of the rustic youth.   --Bp. Hurd.
  2. A festival; a festive celebration.
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  festivity
       n : any joyous diversion [syn: celebration]